Submission #1694735

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Source Code Expand

#include<bits/stdc++.h>
using namespace std;

#define REP(i,n) for(int (i)=0;(i)<(n);(i)++)
#define REP2(i,s,n) for(int (i)=(s);(i)<(n);(i)++)


int main(){
	int r,c;
	int start[2],goal[2];
	int i,j;
	int temp;
	int dx[4] = {-1,0,0,1};
	int dy[4] = {0,-1,1,0};
	queue<int> x,y;

	scanf("%d %d",&r,&c);
	scanf("%d %d",&start[0],&start[1]);
	scanf("%d %d",&goal[0],&goal[1]);
	REP(i,2){
		start[i]--;
		goal[i]--;					
	}
	char meiro[r][c];
	int copy[r][c];
	
	REP(i,r){
		scanf("%s",meiro[i]);
	}
	REP(i,r){
		REP(j,c){
			copy[i][j]=-1;			
		}
	}
	
	x.push(start[1]);
	y.push(start[0]);
	copy[y.front()][x.front()] = 0;
	int nx,ny;
	while(x.empty()==0 || y.empty()==0){
		nx = x.front();
		ny = y.front();
		REP(i,4){
			if(meiro[ny+dy[i]][nx+dx[i]] == '.' && copy[ny+dy[i]][nx+dx[i]]==-1){
				x.push(nx+dx[i]);
				y.push(ny+dy[i]);
				copy[ny+dy[i]][nx+dx[i]] = copy[ny][nx]+1;
			}
		}
		x.pop();
		y.pop();
	}
	/*
	REP(i,r){
		REP(j,c){
			printf("%c",meiro[i][j]);			
		}
		printf("\n");
	}
	REP(i,r){
		REP(j,c){
			if(meiro[i][j]=='.'){
				printf("%2d",copy[i][j]);
			}else{
				printf(" %c",meiro[i][j]);
			}

		}
		printf("\n");
	}
	*/
	printf("%d\n",copy[goal[0]][goal[1]]);
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:17:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d",&r,&c);
                      ^
./Main.cpp:18:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d",&start[0],&start[1]);
                                    ^
./Main.cpp:19:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d",&goal[0],&goal[1]);
                                  ^
./Main.cpp:28:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%s",meiro[i]);
                       ^

Judge Result