Submission #2247114

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Source Code Expand

#include<cstdio>
#include<cstring>
#include<algorithm>
#define MN 2005
using namespace std;
inline int in(){
    int x=0;bool f=0; char c;
    for (;(c=getchar())<'0'||c>'9';f=c=='-');
    for (x=c-'0';(c=getchar())>='0'&&c<='9';x=(x<<3)+(x<<1)+c-'0');
    return f?-x:x;
}
bool s[MN][MN];
char ch[MN];
int s1[MN][MN],s2[MN][MN],f[MN][MN],sum[MN][MN];
int n,m,q,xa,ya,xb,yb,res;
int main()
{
	n=in();m=in();q=in();
	for (int i=1;i<=n;++i){
		scanf("%s",ch);
		for (int j=0;j<m;++j) s[i][j+1]=ch[j]-'0';
	}
	for (int i=1;i<=n;++i){
		for (int j=1;j<=m;++j){
			s1[i][j]=s1[i][j-1]+(s[i][j]&&s[i-1][j]);
			s2[i][j]=s2[i-1][j]+(s[i][j]&&s[i][j-1]); 
			f[i][j]=f[i-1][j]+f[i][j-1]-f[i-1][j-1]+(s[i][j]&&s[i-1][j])+(s[i][j]&&s[i][j-1]);
			sum[i][j]=sum[i-1][j]+sum[i][j-1]-sum[i-1][j-1]+(s[i][j]);
		}
	}
	for (int i=1;i<=q;++i){
		xa=in();ya=in();xb=in();yb=in();
		res=sum[xb][yb]-sum[xa-1][yb]-sum[xb][ya-1]+sum[xa-1][ya-1];
		res-=f[xb][yb]-f[xa-1][yb]-f[xb][ya-1]+f[xa-1][ya-1];
		res+=s1[xa][yb]+s2[xb][ya]-s1[xa][ya-1]-s2[xa-1][ya];printf("%d\n",res);
	}
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:20:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%s",ch);
                 ^

Judge Result