Submission #2246998

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Source Code Expand

#include<cstdio>
using namespace std;
int x,y,xx,yy,n,m,q,c[2005][2005],cnt[2005][2005],e[2005][2005],e2[2005][2005],e3[2005][2005];
int main(){
	scanf("%d%d%d",&n,&m,&q);
	for(int i=1;i<=n;++i)
		for(int j=1;j<=m;++j){
			scanf("%1d",&c[i][j]);
			e2[i][j]=e2[i][j-1];e3[i][j]=e3[i-1][j];
			if(c[i][j]&&c[i][j-1]) ++e2[i][j];
			if(c[i][j]&&c[i-1][j]) ++e3[i][j];
		}
	for(int i=1;i<=n;++i)
		for(int j=1;j<=m;++j){
			cnt[i][j]=cnt[i-1][j]+cnt[i][j-1]-cnt[i-1][j-1]+c[i][j];
			e[i][j]=e[i-1][j]+e[i][j-1]-e[i-1][j-1];
			if(c[i][j]){
				if(c[i-1][j]) ++e[i][j];
				if(c[i][j-1]) ++e[i][j];
			}
		}
	while(q--){
		scanf("%d%d%d%d",&x,&y,&xx,&yy);--x;--y;
//		printf("**%d %d**\n",cnt[xx][yy]+cnt[x][y]-cnt[x][yy]-cnt[xx][y],e[xx][yy]+e[x+1][y+1]-e[x+1][yy]-e[xx][y+1]+e2[x+1][yy]-e2[x+1][y+1]+e3[xx][y+1]-e3[x+1][y+1]);
		printf("%d\n",cnt[xx][yy]+cnt[x][y]-cnt[x][yy]-cnt[xx][y]-(e[xx][yy]+e[x+1][y+1]-e[x+1][yy]-e[xx][y+1]+e2[x+1][yy]-e2[x+1][y+1]+e3[xx][y+1]-e3[x+1][y+1]));
	}
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:5:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d",&n,&m,&q);
                          ^
./Main.cpp:8:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
    scanf("%1d",&c[i][j]);
                         ^
./Main.cpp:23:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d%d",&x,&y,&xx,&yy);--x;--y;
                                  ^

Judge Result