Submission #1319994

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Source Code Expand

#include<set>
#include<map>
#include<cmath>
#include<queue>
#include<bitset>
#include<string>
#include<cstdio>
#include<cctype>
#include<cstdlib>
#include<cstring>
#include<cassert>
#include<sstream>
#include<numeric>
#include<iostream>
#include<algorithm>
#include<functional>

#define For(i,x,y) for (int i=x;i<y;i++)
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define lf else if

#define dprintf(...) fprintf(stderr,__VA_ARGS__)
using namespace std;

typedef long long ll;
typedef double db;
typedef vector<int> Vi;
typedef pair<int,int> pii;

int IN(){
	int c,f,x;
	while (!isdigit(c=getchar())&&c!='-');c=='-'?(f=1,x=0):(f=0,x=c-'0');
	while (isdigit(c=getchar())) x=(x<<1)+(x<<3)+c-'0';return !f?x:-x;
}

const int N=1000+19;
const int oo=(1<<30)-1;

char s[N][N];
int sum[N][N];
int n,tmp,res=oo;

int cal(int X1,int Y1,int X2,int Y2){
	return sum[X2][Y2]-sum[X2][Y1-1]-sum[X1-1][Y2]+sum[X1-1][Y1-1];
}

int main(){
	n=IN();
	For(i,1,n+1) scanf("%s",s[i]+1);
	For(i,1,n+1) For(j,1,n+1){
		sum[i][j]=sum[i-1][j]+sum[i][j-1]-sum[i-1][j-1]+(s[i][j]=='#');
	}
	if (!sum[n][n]) return puts("-1"),0;
	For(i,1,n+1) if (cal(1,i,n,i)==n) tmp++;
	For(i,1,n+1){
		res=min(res,n-cal(i,1,i,n)+!cal(1,i,n,i)+n-tmp);
	}
	printf("%d\n",res);
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:52:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  For(i,1,n+1) scanf("%s",s[i]+1);
                                 ^

Judge Result