delete pics to save space

history_source/ccf 入门篇/U4/4.1.1.cpp

@@ -0,0 +1,7 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	cout<<"0\n\n25\n\n1#\n2$\n3\n4\n5\n\n25:28\n67:70";
+	while(true);
+} 

history_source/ccf 入门篇/U4/4.1.2.cpp

@@ -0,0 +1,25 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	long double s=1;
+	for(int i=2;i<=100;i++)
+	{
+		if(i%2==1) s=s-i;
+		else s=s+i;
+	}
+	cout<<int(s)<<endl;
+	s=0;
+	for(int i=1;i<=10;i++)
+	{
+		s=s+i*(11-i);
+	}
+	cout<<int(s)<<endl;
+	s=0;
+	for(int i=1;i<=100;i++)
+	{
+		s=s+1.0/i;
+	}
+	cout<<s;
+	while(true);
+}

history_source/ccf 入门篇/U4/4.1.3.cpp

@@ -0,0 +1,15 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	float n,s,p;
+	cin>>n;
+	for(int i=0;i<n;i++)
+	{
+		cin>>p;
+		s=s+p;
+	}
+	p=s/n;
+	cout<<int(p*100.0)/100.0;
+	while(true);
+}

history_source/ccf 入门篇/U4/4.1.4.cpp

@@ -0,0 +1,20 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	while(true)
+	{
+		
+	int n,b,s,a;
+	cin>>n;
+	cin>>s;
+	b=s+1;
+	for(int i=0;i<n-1;i++)
+	{
+		cin>>a;
+		if(a>b) b=a;
+		else if(a<s) s=a;
+	}
+	cout<<b-s<<endl<<endl;
+    }
+}

history_source/ccf 入门篇/U4/4.1.5.cpp

@@ -0,0 +1,15 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	unsigned long long s;
+	s=1;
+	for(int i=1;i<64;i++)
+	{
+		s=s+s*2;
+	}
+	long double t;
+	t=s/142000000;
+	cout<<t;
+	while(true);
+}

history_source/ccf 入门篇/U4/4.1.6.cpp

@@ -0,0 +1,18 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int n;
+	int s;
+	while(true)
+	{
+		cin>>n;
+		s=0;
+		for(int i=1;i*i<=n;i++)
+		{
+			if(n%i==0) s=s+2;
+			if(i*i==n) s=s-1;
+		}
+		cout<<s<<endl;
+	}
+}

history_source/ccf 入门篇/U4/4.1.7.cpp

@@ -0,0 +1,21 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int n,a,b,c,a1,b1,c1;
+	while(true)
+	{
+		a=0;
+		b=0;
+		c=0;
+		cin>>n;
+	    for(int i=0;i<n;i++)
+	    {
+		cin>>a1>>b1>>c1;
+		a+=a1;
+		b+=b1;
+		c+=c1;
+	    }
+	    cout<<a<<" "<<b<<" "<<c<<" "<<a+b+c<<endl<<endl;
+	}
+}

history_source/ccf 入门篇/U4/4.1.8.cpp

@@ -0,0 +1,20 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int a,b,s,f;
+	while(true)
+	{
+		cin>>s;
+		b=s+1;
+		a=a+s;
+		for(int i=0;i<9;i++)
+		{
+			cin>>f;
+			if(f>b) b=f;
+			if(f<s) s=f;
+			a=a+f;
+		}
+		cout<<(a-b-s)/8.0<<endl<<endl;
+	}
+}

history_source/ccf 入门篇/U4/4.1.9.cpp

@@ -0,0 +1,17 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int m,t,f;
+	while(true)
+	{
+		m=0;
+		cin>>t;
+		for(int i=0;i<10;i++)
+		{
+			cin>>f;
+			if(t+30>=f) m++;
+		}
+		cout<<m<<endl<<endl;
+	}
+}

history_source/ccf 入门篇/U4/4.2.1.cpp

@@ -0,0 +1,7 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	cout<<"0 4201 987654321\n\n000  \n\n50 1 1";
+	while(true);
+} 

history_source/ccf 入门篇/U4/4.2.2.cpp

@@ -0,0 +1,26 @@
+#include<iostream>
+#include<cmath>
+using namespace std;
+int main()
+{
+	int f,i,s,a;
+	while(true)
+	{
+		i=0;
+		s=0;
+		cin>>f;
+		while(true)
+		{
+			a=f;
+			a=a/pow(10,i);
+			if(a==0) break;
+			else
+			{
+			a=a%10;
+			s=s+a;
+			i++;	
+			}
+		}
+		cout<<s<<endl;
+	}
+}

history_source/ccf 入门篇/U4/4.2.3.cpp

@@ -0,0 +1,17 @@
+#include<iostream>
+#include<cmath>
+using namespace std;
+int main()
+{
+	int m,n,b,i;
+	while(true)
+	{
+		cin>>m>>n;
+		b=(m>n)?m:n;
+		for(i=2;i<=b;i++)
+		{
+			if(m%i==0&&n%i==0) {cout<<"No"<<endl;break;}
+		}
+		if(!(m%i==0&&n%i==0)) cout<<"Yes"<<endl;
+	}
+}

history_source/ccf 入门篇/U4/4.2.4.cpp

@@ -0,0 +1,20 @@
+#include<iostream>
+#include<string>
+#include<sstream>
+using namespace std;
+int main()
+{
+	string j;
+	stringstream num;
+	int s,b,n;
+	while(true)
+	{
+		cin>>s>>b;
+		n=0;
+		num.flush();
+		for(int i=0;i<b-s+1;i++) num<<s+i;
+		num>>j;
+		for(int i=0;i<j.size();i++) if(j[i]=='2') n++;
+		cout<<n<<endl;
+	}
+}

history_source/ccf 入门篇/U4/4.2.5.cpp

@@ -0,0 +1,48 @@
+#include<iostream>
+#include<cmath>
+using namespace std;
+int k;
+long long n;
+long double f(long long n)
+{
+	long double s=0;
+	for(int i=1;i<=n;i++)
+	{
+		s=s+1.0/i;
+	}
+	return s;
+}
+int main()
+{
+	while(true)
+	{
+		cin>>k;
+		if(k>=10) n=pow(k,4);
+		else{
+		if(k>=6) n=pow(k,3);
+		else n=k*k;
+	    }
+	    if(k<12){
+		while(f(n)<=k)n+=3;
+		if(f(n-1)>k) 
+		{if(f(n-2)>k) cout<<n-2<<endl;
+		else cout<<n-1<<endl;}
+		else cout<<n<<endl;}
+		else {
+			if(k>=14) n=pow(k,5);
+			if(k>=15) while(f(n)<=k) n+=4096;
+			else while(f(n)<=k) n+=2048;
+			if(f(n-2048)>k) n-=2048;
+			if(f(n-1024)>k) n-=1024;
+			if(f(n-512)>k) n-=512;
+			if(f(n-256)>k) n-=256;
+			if(f(n-128)>k) n-=128;
+			if(f(n-64)>k) n-=64;
+			if(f(n-32)>k) n-=32;
+			if(f(n-16)>k) n-=16;
+			while(f(n)>k) n--;
+			n++;
+			cout<<n<<endl;
+		}
+	}
+}

history_source/ccf 入门篇/U4/4.2.6.cpp

@@ -0,0 +1,21 @@
+#include<iostream>
+#include<cmath>
+#include<string>
+using namespace std;
+int main()
+{
+	string a;
+	char f;
+	while(true)
+	{
+		cin>>a;
+		for(int i=0;i<a.size();i++)
+		{
+			f=a[i];
+			if(f>='A'&&f<='Z') f=(f-'A'+3)%26+'A';
+			if(f>='a'&&f<='z') f=(f-'a'+3)%26+'a'; 
+		    cout<<f;
+		}
+		cout<<endl<<endl;
+	}
+}

history_source/ccf 入门篇/U4/4.3.1.cpp

@@ -0,0 +1,7 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	cout<<"001 0\n\n50 1 0\n\n8";
+	while(true);
+} 

history_source/ccf 入门篇/U4/4.3.2.cpp

@@ -0,0 +1,17 @@
+#include<iostream>
+#include<cmath>
+using namespace std;
+int main()
+{
+	long double pi4=0;
+	long long n=1,j=1;
+	do
+	{
+		if(j%2==1) pi4=pi4+1.0/n;
+		else pi4=pi4-1.0/n;
+		n+=2;
+		j++;
+	}while(1.0/n>=0.000001);
+	cout<<pi4*4.0;
+	while(true);
+}

history_source/ccf 入门篇/U4/4.3.3.cpp

@@ -0,0 +1,14 @@
+#include<iostream>
+#include<cmath>
+using namespace std;
+int main()
+{
+	double l=200,s=0;
+	do
+	{
+		s=s+l;
+		l/=2;
+	} while(l>=0.5);
+	cout<<s;
+	while(true);
+}

history_source/ccf 入门篇/U4/4.3.4.cpp

@@ -0,0 +1,27 @@
+#include<iostream>
+#include<string>
+#include<sstream>
+#include<cmath>
+using namespace std;
+int main()
+{
+	stringstream num;
+	string j;
+	int a,b;
+	bool z,x;
+	while(true)
+	{
+		cin>>a;
+		z=0;
+		if(a<0){z=1;a=abs(a);}
+		b=0;
+		do
+		{
+			b=b*10+a%10;
+			a/=10;
+		}while(a>0);
+		a=b;
+		if(z==1) a=0-a;
+		cout<<a<<endl;
+	}
+}

history_source/ccf 入门篇/U4/4.3.5.cpp

@@ -0,0 +1,32 @@
+#include<cstdio> 
+using namespace std;
+int main()
+{
+	int x=1,y=1,n;
+	scanf("%d",&n);
+	bool f=1;
+	for(int i=1;i<n;i++)
+	{
+		if(f)
+		{
+			if(y>1) y--,x++;
+			else
+			{
+				f=0;
+				x++;
+			}
+		}
+		else
+		{
+			if(x>1) x--,y++;
+			else
+			{
+				f=1;
+				y++;
+			}
+		}
+	}
+	printf("%d/%d\n",y,x);
+	return 0;
+}
+

history_source/ccf 入门篇/U4/4.3.6.cpp

@@ -0,0 +1,18 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int n,a;
+	while(true)
+	{
+		cin>>n;
+		a=1;
+		while(n!=1)
+		{
+			if(n%2==0) n/=2;
+			else n=3*n+1;
+			a++;
+		} 
+		cout<<a<<endl;
+	}
+}

history_source/ccf 入门篇/U4/4.4.2.cpp

@@ -0,0 +1,18 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int n;
+	while(true)
+	{
+		cin>>n;
+		for(int i=0;i<n;i++)
+		{
+			for(int a=0;a<(n*2-1-i*2-1)/2;a++) cout<<" ";
+			for(int a=0;a<i*2+1;a++) cout<<"*";
+			for(int a=0;a<(n*2-1-i*2-1)/2;a++) cout<<" ";
+			cout<<endl;
+		}
+		cout<<endl;
+	}
+}

history_source/ccf 入门篇/U4/4.4.3.cpp

@@ -0,0 +1,25 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int n;
+	while(true)
+	{
+		cin>>n;
+		for(int i=0;i<n;i++)
+		{
+			for(int a=0;a<(n*2-1-i*2-1)/2;a++) cout<<" ";
+			for(int a=1;a<=i*2+1;a++) cout<<a;
+			for(int a=0;a<(n*2-1-i*2-1)/2;a++) cout<<" ";
+			cout<<endl;
+		}
+		for(int i=1;i<=n-1;i++)
+		{
+			for(int a=0;a<i;a++) cout<<" ";
+			for(int a=1;a<=2*n-1-2*i;a++) cout<<a;
+			for(int a=0;a<i;a++) cout<<" ";
+			cout<<endl;
+		}
+		cout<<endl;
+	}
+}

history_source/ccf 入门篇/U4/4.4.4.cpp

@@ -0,0 +1,16 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int n;
+	while(true)
+	{
+		cin>>n;
+		for(int i=1;i<=n;i++)
+		{
+			for(int a=1;a<=i;a++) cout<<a<<"*"<<i<<"="<<a*i<<"  ";
+			cout<<endl;
+		}
+		cout<<endl;
+	}
+}

history_source/ccf 入门篇/U4/4.4.5.cpp

@@ -0,0 +1,19 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int n,s,r,w,a;
+	while(true)
+	{
+		cin>>n;
+		a=0;
+		for(w=0;w<=n/50;w++)
+		{
+			for(r=0;r<=n/20;r++)
+			{
+				for(s=0;s<=100/10;s++) if(w*50+r*20+s*10==n) a++;
+			}
+		}
+		cout<<a<<endl;
+	}
+}

history_source/ccf 入门篇/U4/4.4.6.cpp

@@ -0,0 +1,23 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int a,b;
+	while(true)
+	{
+		cin>>a;
+		do
+		{
+			b=0;
+			do
+			{
+				b=b+a%10;
+				a/=10;
+			}
+			while(a>0);
+			a=b;
+		}
+		while(a/10>0);
+		cout<<a;
+	}
+}

history_source/ccf 入门篇/U4/4.4.7.cpp

@@ -0,0 +1,26 @@
+#include<iostream>
+using namespace std;
+int zd(int a,int b)
+{
+	int ans=1;
+	for(int i=2;i<=(a<b?a:b);i++) if(a%i==0&&b%i==0) ans=i;
+	return ans;
+}
+int zx(int a,int b)
+{
+	return a*b/zd(a,b);
+}
+int main()
+{
+	int answer,x,y,p,q;
+	while(true)
+	{
+		answer=0;
+		cin>>x>>y;
+		for(p=x;p<=y;p++)
+		{
+			for(q=x;q<=y;q++) if(zd(p,q)==x&&zx(p,q)==y) answer++;
+		}
+		cout<<answer<<endl;
+	}
+}

history_source/ccf 入门篇/U4/4.5.1.cpp

@@ -0,0 +1,9 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	cout<<"9\n28\n2047\n\n\n";
+	cout<<"0\n1\n12\n\n\n";
+	cout<<"9\n28\n2047";
+	while(true);
+}

history_source/ccf 入门篇/U4/4.5.2.cpp

@@ -0,0 +1,17 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int n;
+	while(true)
+	{
+		cin>>n;
+		do
+		{
+			cout<<"<EFBFBD><EFBFBD> "<<n/2<<"<EFBFBD><EFBFBD>"<<"<EFBFBD><EFBFBD> "<<n%2<<endl;
+			n/=2;
+		}
+		while(n>0);
+		cout<<endl;
+	}
+}

history_source/ccf 入门篇/U4/4.5.3.cpp

@@ -0,0 +1,17 @@
+#include<iostream>
+#include<cmath> 
+using namespace std;
+int main()
+{
+	long long a,b;
+	while(true)
+	{
+		cin>>a>>b;
+		a=a%10; 
+		for(int i=1;i<b;i++){
+			a=a*a;
+			a=a%10;
+		}
+		cout<<a<<endl;
+	}
+}

history_source/ccf 入门篇/U4/4.5.4.cpp

@@ -0,0 +1,15 @@
+#include<iostream>
+using namespace std;
+int main()
+{
+	int j[13],a;
+	while(true)
+	{
+		for(int i=0;i<13;i++) j[i]=0;
+		for(int i=0;i<25;i++){
+			cin>>a;
+			j[a-1]=j[a-1]+1;
+		} 
+		for(int i=0;i<13;i++) if(j[i]<2) cout<<i+1;
+	}
+}

history_source/ccf 入门篇/U4/4.5.5.cpp

@@ -0,0 +1,12 @@
+#include<iostream>
+#include<cmath>
+using namespace std;
+int main()
+{
+	int n;
+	while(true)
+	{
+		cin>>n;
+		cout<<pow(2,n)<<endl<<"============="<<endl;
+	}
+}

history_source/ccf 入门篇/U4/4.5.6.cpp

@@ -0,0 +1,15 @@
+#include<iostream>
+#include<cmath>
+using namespace std;
+int main()
+{
+	int n,m,k,x;
+	long long a;
+	while(true)
+	{
+		cin>>n>>m>>k>>x;
+		a=pow(10,k);
+		k=a%n;
+		cout<<(m*k+x)%n<<endl;
+	}
+}

history_source/ccf 入门篇/U4/4.6.1.cpp

@@ -0,0 +1,52 @@
+#include<iostream>
+#include<cmath>
+using namespace std;
+int p;
+bool pan(int a,int b,int c,int d,int e,int f,int g,int h,int i)
+{
+	if((a<f&&f<i)&&(b<d&&g<h&&c<e)&&(a+b+d+f==f+g+h+i==i+e+c+a==p)) return 1;
+	else return 0;
+}
+int main()
+{
+	int n;
+	while(true)
+	{
+		cin>>p;
+		n=0;
+		for(int a=1;a<=9;a++)
+		{
+			for(int b=1;b<=9;b++)
+			{
+				if(b==a) continue;
+				for(int c=1;c<=9;c++)
+				{
+					if(c==a||c==b) continue;
+					for(int d=1;d<=9;d++)
+					{
+						if(d==a||d==b||d==c) continue;
+						for(int e=1;e<=9;e++)
+						{
+							if(e==a||e==b||e==c||e==d) continue;
+							for(int f=1;f<=9;f++)
+							{
+								if(f==a||f==b||f==c||f==d||f==e) continue;
+								for(int g=1;g<=9;g++)
+								{
+									if(g==a||g==b||g==c||g==d||g==e||g==f) continue;
+									for(int h=1;h<=9;h++)
+									{
+										if(h==a||h==b||h==c||h==d||h==e||h==f||h==g) continue;
+										int i=45-a-b-c-d-e-f-g-h;
+										if(pan(a,b,c,d,e,f,g,h,i)) n++;
+									}
+								}
+							}
+						}
+					}
+				}
+			}
+		}
+		cout<<n<<endl;
+	}
+}

history_source/ccf 入门篇/U4/4.6.2.cpp

@@ -0,0 +1,42 @@
+#include<iostream>
+#include<cmath>
+using namespace std;
+int n;
+void pai(int &x,int &y)
+{
+	while(x>0&&y>0)
+	{
+		x--;
+		y--;
+	}
+}
+void pai2(int &x,int &y)
+{
+	while(x<=n&&y>0) 
+	{
+		x++;
+		y--;
+	}
+}
+int main()
+{
+	int i,j,xx,yy;
+	while(true)
+	{
+		cin>>n>>i>>j;
+		for(int x=1;x<=n;x++) cout<<"("<<i<<","<<x<<") ";
+		cout<<endl;
+		for(int x=1;x<=n;x++) cout<<"("<<x<<","<<j<<") ";
+		cout<<endl;
+		xx=j;
+		yy=i;
+		pai(xx,yy);
+		for(int ii=1;ii+xx<=n&&ii+yy<=n;ii++) cout<<"("<<ii+yy<<","<<ii+xx<<") ";
+		xx=j;
+		yy=i;
+		pai2(xx,yy);
+		cout<<endl;
+		for(int ii=1;xx-ii>0&&ii+yy<=n;ii++)  cout<<"("<<xx-ii<<","<<ii+yy<<") ";
+		cout<<endl;
+	}
+}

history_source/ccf 入门篇/U4/4.6.3.cpp

@@ -0,0 +1,21 @@
+#include<iostream>
+#include<cmath>
+using namespace std;
+int main()
+{
+	int n,a,b;
+	while(true)
+	{
+		cin>>n;
+		for(int i=2;i*i<n;i++)
+		{
+			if(n%i==0)
+			{
+				a=i;
+				b=n/a;
+				break;
+			}
+		}
+		cout<<((a>b)?a:b)<<endl;
+	}
+}

history_source/ccf 入门篇/U4/4.6.4.cpp

@@ -0,0 +1,33 @@
+#include<iostream>
+#include<cmath>
+using namespace std;
+int main()
+{
+	int money[12],ans,c,n;
+	bool j;
+	while(true)
+	{
+		j=1;
+		for(int i=0;i<12;i++) cin>>money[i];
+		ans=0;
+		c=0;
+		for(int i=0;i<12;i++)
+		{
+			n=300+ans;
+			if(n<money[i]) {
+				cout<<"-"<<i+1<<endl;
+				j=0;
+				break;
+			}
+			else
+			{
+				ans=n-money[i];
+				while(ans-100>=0) {
+					ans-=100;
+					c+=100;
+				}
+			}
+		}
+		if(j) cout<<c*1.2+ans<<endl;
+	}
+}

history_source/ccf 入门篇/U4/4.6.5.cpp

@@ -0,0 +1,28 @@
+#include<iostream>
+#include<cmath>
+using namespace std;
+bool z(int a)
+{
+	for(int i=2;i*i<=a;i++) if(a%i==0) return 0;
+	return 1;
+}
+int main()
+{
+	int a,b;
+	bool d;
+	while(true)
+	{
+		d=1;
+		cin>>a>>b;
+		for(int i=2;i<=((a<b)?a:b);i++) 
+		{
+			if(z(i)){
+			if(b%i==0)
+			{
+				if(a%i!=0) d=0;
+			}}
+		}
+		if(d) cout<<"Yes"<<endl;
+		else cout<<"No"<<endl;
+	}
+}