delete pics to save space

1.3371.cpp

@@ -0,0 +1,162 @@
+#include<cstdio>
+using namespace std;
+typedef long long ll;
+const int maxn=10005;
+const int maxm=500005;
+const ll oo=2147483647;
+struct char_reader
+{
+	FILE* f;
+	char *buf,*p1,*p2;
+	int size;
+	char_reader(FILE* fin,int bufsize=65536)
+	{
+		f=fin;
+		size=bufsize;
+		p1=p2=0;
+		buf=new char[bufsize];
+	}
+	inline int operator()()
+	{
+		return p1==p2&&(p2=(p1=buf)+fread(buf,1,size,f),p1==p2)?EOF:*p1++;
+	}
+};
+struct char_writer
+{
+	FILE* f;
+	char *buf,*p,*end;
+	char_writer(FILE* fout,int bufsize=65536)
+	{
+		f=fout;
+		buf=new char[bufsize];
+		p=buf;
+		end=buf+bufsize;
+	}
+	~char_writer()
+	{
+		fwrite(buf,p-buf,1,f);
+	}
+	inline char operator()(char ch)
+	{
+		return end==p&&(fwrite(buf,end-buf,1,f),p=buf),*p++=ch;
+	}
+};
+char_reader gch(stdin);
+char_writer wch(stdout);
+inline void read(int &x)
+{
+	bool f=true;int ch;
+	x=0;
+	while(ch=gch(),!(ch=='-'||ch>='0'&&ch<='9'));
+	if(ch=='-') f=false,ch=gch();
+	x=ch-'0';
+	while(ch=gch(),ch>='0'&&ch<='9') x=x*10+ch-'0';
+	if(!f) x=-x;
+}
+inline int write(ll x)
+{
+	if(x==0) return wch('0');
+	if(x<0) wch('-'),x=-x;
+	static char buf[20],top;
+	top=0;
+	while(x>0) buf[top++]=x%10+'0',x/=10;
+	while(top>0) wch(buf[--top]);
+}
+struct Edge
+{
+	int to;
+	ll dist;
+	Edge *next;
+};
+ll d[maxn];
+bool vis[maxn];
+Edge *e[maxn],mem[maxm],*ecnt=mem;
+int n,m,s;
+inline void AddEdge(int from,int to,ll dist)
+{
+	ecnt->to=to; ecnt->dist=dist; ecnt->next=e[from];
+	e[from]=ecnt++;
+}
+class deque
+{
+	private:
+		int Size;
+		int Q[maxn];
+		int head,tail;
+	public:
+		inline int size() { return Size; }
+		inline int front() { return Q[head]; }
+		inline void pop_front()
+		{
+			Size--;
+			head=(head+1)%maxn;
+		}
+		inline void push_front(int v)
+		{
+			Size++;
+			head=(head-1+maxn)%maxn;
+			Q[head]=v;
+		}
+		inline void push_back(int v)
+		{
+			Size++;
+			Q[tail]=v;
+			tail=(tail+1)%maxn;
+		}
+	deque() { Size=head=tail=0; }
+};
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif
+//	scanf("%d%d%d",&n,&m,&s);
+	read(n);read(m);read(s);
+	for(int i=1;i<=n;i++) d[i]=oo;
+	d[s]=0;
+	int f,t,dist;
+	ll sum=0;
+	for(int i=0;i<m;i++)
+	{
+//		scanf("%d%d%lld",&f,&t,&dist);
+		read(f);read(t);read(dist);
+		AddEdge(f,t,dist);
+	}
+	deque Q;
+	Q.push_back(s);
+	vis[s]=true;
+	while(Q.size())
+	{
+		int u;
+		while(true)
+		{
+			u=Q.front();Q.pop_front();
+			if(d[u]*Q.size()<=sum) break;
+			Q.push_back(u);
+		}
+		vis[u]=false;
+		sum-=d[u];
+		for(Edge *it=e[u];it;it=it->next)
+			if(d[it->to]>d[u]+it->dist)
+			{
+				if(!vis[it->to])
+				{
+					d[it->to]=d[u]+it->dist;
+					if(Q.size()>0&&d[Q.front()]>d[it->to]) Q.push_front(it->to);
+					else Q.push_back(it->to);
+					vis[it->to]=true;
+					sum+=d[it->to];
+				}
+				else
+				{
+					sum-=d[it->to];
+					d[it->to]=d[u]+it->dist;
+					sum+=d[it->to];
+				}
+			}
+	}
+	for(int i=1;i<=n;i++)
+		write(d[i]),wch(' ');
+	wch('\n');
+	return 0;
+}