delete pics to save space

8.2351.cpp

@@ -0,0 +1,53 @@
+#include<cstdio>
+#include<iostream>
+#include<cstring>
+#include<set>
+#include<algorithm>
+using namespace std;
+const int maxn=1005;
+const unsigned long long Pr=13141,Pc=521;
+int N,M,A,B,Q;
+int a[maxn][maxn]; char buf[maxn];
+unsigned long long H[maxn][maxn],pmr[maxn],pmc[maxn];
+set<unsigned long long> st;
+inline void read(int R,int C)
+{
+	for(int i=1;i<=R;i++)
+	{
+		scanf("%s",buf);
+		for(int j=1;j<=C;j++) a[i][j]=(buf[j-1]-'0');
+	}
+}
+inline void Cal(int R,int C)
+{
+	for(int i=1;i<=R;i++) for(int j=1;j<=C;j++) H[i][j]=H[i-1][j]*Pr+H[i][j-1]*Pc-H[i-1][j-1]*Pr*Pc+(a[i][j]+51);
+}
+inline void Build()
+{
+	unsigned long long RM=pmr[A],CM=pmc[B],BM=pmr[A]*pmc[B];
+	for(int i=A;i<=N;i++) for(int j=B;j<=M;j++) st.insert( H[i][j] - H[i-A][j]*RM - H[i][j-B]*CM + H[i-A][j-B]*BM);
+}
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+	freopen("pro.out","w",stdout);
+#endif
+	scanf("%d%d%d%d",&N,&M,&A,&B);
+	pmr[0]=pmc[0]=1;
+	for(int i=1;i<maxn;i++) pmr[i]=pmr[i-1]*Pr,pmc[i]=pmc[i-1]*Pc;
+	read(N,M);
+	Cal(N,M);
+	Build();
+	scanf("%d",&Q);
+//	cerr<<"Q="<<Q<<endl;
+	while(Q-->0)
+	{
+		read(A,B);
+		Cal(A,B);
+	//	cerr<<H[A][B]<<endl;
+		if(st.find(H[A][B])!=st.end()) puts("1");
+		else puts("0");
+	}
+	return 0;
+}