Submission #4308961

---

Source Code Expand

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> Pair;
#define MM 1000000000
#define MOD MM+7
#define MAX 10000
#define MAP 51
#define GRAPH 50
int dx[4] = {-1, 0, 1, 0};
int dy[4] = {0, -1, 0, 1};
int n,m;
int R,C,sx,sy,gx,gy;
char c[MAP][MAP];
int dist[MAP][MAP];
Pair s, g;
int dfs(){
    queue<Pair> que;
    for(int i = 0; i < R; i++){
        for(int j = 0; j < C; j++){
            dist[i][j] = MAX;
        }
    }
    que.push(Pair(s.first-1, s.second-1));
    d[s.first-1][s.second-1] = 0;;
    while(que.size()){
        Pair p = que.front();
        que.pop();
        for(int i = 0; i < 4; i++){
            int nx = p.first + dx[i];
            int ny = p.second + dy[i];
            if(c[nx][ny] == '.' && d[nx][ny] == MAX){
                que.push(Pair(nx,ny));
                d[nx][ny] = d[p.first][p.second] + 1;
            }
        }
    }
    return d[g.first-1][g.second-1];
}
int main(){
    scanf("%d %d", &R, &C);
    scanf("%d %d", &s.first, &s.second);
    scanf("%d %d", &g.first, &g.second);
    for(int i = 0; i < R; i++){
        for(int j = 0; j < C; j++){
            cin >> c[i][j];
        }
    }
    int ans = dfs();
    cout << ans << endl;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int dfs()’:
./Main.cpp:25:5: error: ‘d’ was not declared in this scope
     d[s.first-1][s.second-1] = 0;;
     ^
./Main.cpp: In function ‘int main()’:
./Main.cpp:41:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &R, &C);
                           ^
./Main.cpp:42:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &s.first, &s.second);
                                        ^
./Main.cpp:43:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &g.first, &g.second);
                                        ^