delete pics to save space

1.1624.cpp

@@ -0,0 +1,59 @@
+#include<cstdio>
+#include<cstring>
+#include<algorithm>
+#include<iostream>
+#include<string>
+#include<set>
+#include<sstream>
+using namespace std;
+const int maxn=150;
+set<string> emmm;
+int n,f[maxn][maxn][maxn];
+string t,a,b[maxn];
+inline void LOW(string &s)
+{
+	for(int i=0;i<s.size();i++) if('A'<=s[i]&&s[i]<='Z') s[i]=s[i]+32;
+}
+inline int low(char a) { return 'A'<=a&&a<='Z'?a+32:a; }
+int main()
+{
+	#ifdef local
+	freopen("pro.in","r",stdin);
+	#endif
+	cin>>n;
+	for(int i=0;i<n;i++) { cin>>t; emmm.insert(t); }
+	getline(cin,t);
+	while(getline(cin,t))
+	{
+		if(t=="LAST CASE"||t=="LAST CASE\r") return 0;
+		stringstream ss(t);
+		ss>>a;
+		a="#"+a;
+		n=0;
+		b[++n]="#";
+		while(ss>>t)
+		{
+			LOW(t);
+			if(emmm.find(t)!=emmm.end()) continue;
+			n++;
+			b[n]=t;
+		}
+		memset(f,0,sizeof(f));
+		f[1][1][0]=1;
+		for(int i=2;i<=a.size();i++)
+			for(int j=2;j<=n;j++)
+				for(int k=0;k<b[j].size();k++)
+				{
+					if(low(a[i-1])!=b[j][k]) continue;
+					int &v=f[i][j][k];
+					char c=low(a[i-2]);
+					for(int l=0;l<b[j-1].size();l++) if(b[j-1][l]==c) v+=f[i-1][j-1][l];
+					for(int l=0;l<k;l++) if(b[j][l]==c) v+=f[i-1][j][l];
+				}
+		int tot=0;
+		for(int i=0;i<b[n].size();i++) tot+=f[a.size()][n][i];
+		if(tot) cout<<a.substr(1)<<" can be formed in "<<tot<<" ways"<<endl;
+		else cout<<a.substr(1)<<" is not a valid abbreviation"<<endl;
+	}
+	return 0;
+}