Submission #2247355

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Source Code Expand

#include<bits/stdc++.h>
#define F(i,a,b) for(int i=(a);i<=(b);++i)

int N,M,Q;
char str[2005];
int fk[2005][2005],f2[2005][2005],f3[2005][2005];

int main(){
	scanf("%d%d%d",&N,&M,&Q);
	F(i,1,N){
		scanf("%s",str+1);
		F(j,1,M){
			if(str[j]=='1'){
				fk[i][j]=1;
				if(fk[i-1][j]) f2[i-1][j]=1;
				if(fk[i][j-1]) f3[i][j-1]=1;
			}
		}
	}
	F(i,1,N) F(j,1,M)
		fk[i][j]+=fk[i-1][j]+fk[i][j-1]-fk[i-1][j-1],
		f2[i][j]+=f2[i-1][j]+f2[i][j-1]-f2[i-1][j-1],
		f3[i][j]+=f3[i-1][j]+f3[i][j-1]-f3[i-1][j-1];
	F(i,1,Q){
		int X1,Y1,X2,Y2;
		scanf("%d%d%d%d",&X1,&Y1,&X2,&Y2);
		int Dots=fk[X2][Y2]-fk[X1-1][Y2]-fk[X2][Y1-1]+fk[X1-1][Y1-1];
		int Edges=f2[X2-1][Y2]-f2[X1-1][Y2]-f2[X2-1][Y1-1]+f2[X1-1][Y1-1]+f3[X2][Y2-1]-f3[X1-1][Y2-1]-f3[X2][Y1-1]+f3[X1-1][Y1-1];
		printf("%d\n",Dots-Edges);
	}
	return 0;
}

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);
                          ^
./Main.cpp:11:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%s",str+1);
                    ^
./Main.cpp:26:36: 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