Submission #1833796

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Source Code Expand

#include <bits/stdc++.h>
#ifdef DEMETRIO
#define deb(...) fprintf(stderr,__VA_ARGS__)
#define deb1(x) cerr << #x << " = " << x << endl
#else
#define deb(...) 0
#define deb1(x) 0
#endif
#define pb push_back
#define mp make_pair
#define fst first
#define snd second
#define fore(i,a,b) for(int i=a,ThxDem=b;i<ThxDem;++i)
#define SZ(x) ((int)x.size())
using namespace std;
typedef long long ll;

char b[512][512];
int uf[1<<19];
bool r[512][512];
int n,m;

int find(int x){
	if(uf[x]<0)return x;
	return uf[x]=find(uf[x]);
}
void join(int x, int y){
	x=find(x);y=find(y);
	if(x==y)return;
	if(uf[x]>uf[y])swap(x,y);
	uf[x]+=uf[y];
	uf[y]=x;
}

int main(){
	scanf("%d%d",&n,&m);
	fore(i,0,n)scanf("%s",b[i]);
	memset(uf,-1,sizeof(uf));
	fore(i,1,n-1)b[i][0]='#',r[i][0]=true;
	fore(i,0,n)fore(j,0,m)fore(i0,-1,2)fore(j0,-1,2){
		if(abs(i0)+abs(j0)==1){
			int ii=i+i0,jj=j+j0;
			if(ii<0||ii>=n||jj<0||jj>=m)continue;
			if(b[i][j]=='#'&&b[ii][jj]=='#'){
				join(i*m+j,ii*m+jj);
			}
		}
	}
	fore(i,1,n-1){
		int l=0;
		fore(j,1,m)if(b[i][j]=='#'){
			if(find(i*m+j)!=find(i*m+l)){
				fore(k,l+1,j)r[i][k]=true;
				join(i*m+j,i*m+l);
			}
			l=j;
		}
	}
	fore(i,1,n-1)b[i][0]='.';
	fore(i,0,n){
		fore(j,0,m)putchar(r[i][j]?'.':'#');
		puts("");
	}
	puts("");
	fore(i,0,n){
		fore(j,0,m)putchar(b[i][j]=='#'||r[i][j]?'#':'.');
		puts("");
	}
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:36:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&m);
                     ^
./Main.cpp:37:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  fore(i,0,n)scanf("%s",b[i]);
                             ^

Judge Result