Submission #3233639

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Source Code Expand

#include<cstdio>
#include<cstring>
const int dire[2][4]={{1,0,0,-1},{0,1,-1,0}};
int n,m,sx,sy,ex,ey;
bool w[505][505];
char s[505];
int qx[260000],qy[260000];
bool bfs(){
	int head=0,tail=1,nx,ny;
	qx[1]=sx;
	qy[1]=sy;
	while(head<tail){
		++head;
//		printf("%d %d\n",qx[head],qy[head]);
		for(int i=0;i<4;i++){
			nx=qx[head]+dire[0][i];
			ny=qy[head]+dire[1][i];
			if(w[nx][ny]){
				if(nx==ex&&ny==ey) return 1;
				++tail;
				qx[tail]=nx;
				qy[tail]=ny;
				w[nx][ny]=0;
			}
		}
	}
	return 0;
}
int main(){
	scanf("%d%d",&n,&m);
	for(int i=1;i<=n;i++){
		scanf("%s",s);
		for(int j=0;j<m;j++){
			if(s[j]=='.') w[i][j+1]=1;
			else if(s[j]=='s'){
				sx=i;
				sy=j+1;
			}
			else if(s[j]=='g'){
				ex=i;
				ey=j+1;
				w[ex][ey]=1;
			}
		}
	}
	if(bfs()) printf("Yes\n");
	else printf("No\n");
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:30:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d",&n,&m);
                     ^
./Main.cpp:32:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%s",s);
                ^

Judge Result