Submission #10501879

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Source Code Expand

#include<iostream>
#include<cstdio>
using namespace std;
int n,m,way[4][2]={{-1,0},{0,1},{1,0},{0,-1}};
bool map[500][500]={0};
struct Q
{
  int i,j;
}q[250000];
bool bgo(int i,int j)
{
  if(i<0||i>=n||j<0||j>=m||map[i][j]) return false;
  return true;
}
bool bfs(int fn,int fm,int ln,int lm)
{
  int head=0,tail=0;
  q[head].i=fn;
  q[head].j=fm;
  map[q[head].i][q[head].j]=1;
  if(q[tail].i==ln&&q[tail].j==lm) return true;
  while(head<=tail)
  {
  	for(int i=0;i<4;i++)
  	  if(bgo(q[head].i+way[i][0],q[head].j+way[i][1]))
  	  {
  	  	q[++tail].i=q[head].i+way[i][0];
  	  	q[tail].j=q[head].j+way[i][1];
  	  	map[q[tail].i][q[tail].j]=1;
  	  	if(q[tail].i==ln&&q[tail].j==lm) return true;
	  }
	head++;
  }
  return false;
}
int main()
{
  int fn,fm,ln,lm;
  scanf("%d%d",&n,&m);
  char init;
  for(int i=0;i<n;i++)
    for(int j=0;j<m;j++)
    {
      cin>>init;
      if(init=='s') 
	  {
	  	fn=i;
	  	fm=j;
      }
      if(init=='g') 
	  {
	  	ln=i;
	  	lm=j;
	  }
	  if(init=='#')
	    map[i][j]=1;
    }
  
  if(bfs(fn,fm,ln,lm))
    printf("Yes\n");
  else
    printf("No\n");
  return 0;
} 

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:39:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&n,&m);
                      ^

Judge Result