Submission #2246252

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Source Code Expand

#include<cstdio>
#include<algorithm>
#include<cstring>
#define MN 2005
using namespace std;
int n,m,q,a[MN][MN],b[MN][MN],c[MN][MN];
char ch[MN][MN];
int main(){
	scanf("%d%d%d",&n,&m,&q);int x1,y1,x2,y2;
	for(int i=1;i<=n;i++)scanf("%s",ch[i]+1);
	for(int i=1;i<=n;i++)
		for(int j=1;j<=m;j++){
			a[i][j]=a[i][j-1]+a[i-1][j]-a[i-1][j-1]+(ch[i][j]=='1');
			b[i][j]=b[i][j-1]+b[i-1][j]-b[i-1][j-1]+(ch[i][j]=='1'&&ch[i][j-1]=='1');
			c[j][i]=c[j-1][i]+c[j][i-1]-c[j-1][i-1]+(ch[i][j]=='1'&&ch[i-1][j]=='1');
		}
	while(q--){
		scanf("%d%d%d%d",&x1,&y1,&x2,&y2);
		printf("%d\n",a[x2][y2]-a[x1-1][y2]-a[x2][y1-1]+a[x1-1][y1-1]-(b[x2][y2]-b[x1-1][y2]-b[x2][y1]+b[x1-1][y1])-(c[y2][x2]-c[y2][x1]-c[y1-1][x2]+c[y1-1][x1]));
	}
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:9:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d",&n,&m,&q);int x1,y1,x2,y2;
                          ^
./Main.cpp:10:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  for(int i=1;i<=n;i++)scanf("%s",ch[i]+1);
                                          ^
./Main.cpp:18:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d%d",&x1,&y1,&x2,&y2);
                                    ^

Judge Result