Submission #2673333

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Source Code Expand

#include <iostream>
#include <queue>
using namespace std;

int main()
{
    int R, C, sy, sx, gy, gx;
    char c[55][55];
    
    cin >> R >> C >> sy >> sx >> gy >> gx;
    for(int i=1; i<=R; i++)
        scanf("%s", c[i]);
    
    queue<pair<int, int> > qp;
    qp.push(make_pair(sy, sx));
    
    int inf = 2 << 29, d[55][55];
    for (int i = 1; i <= R; i++)
        for (int j = 1; j <= C; j++)
            d[i][j] = inf;
    d[sy][sx] = 0;
    
    int dx[4] = {0, 1, 0, -1};
    int dy[4] = {1, 0, -1, 0};
    while (qp.size()) {
        auto p = qp.front();
        qp.pop();
        for (int i = 0; i < 4; i++) {
            int nx = p.second + dx[i];
            int ny = p.first + dy[i];
            if (0 <= nx && nx < C && 0 <= ny && ny < R && c[ny][nx] == '.' && d[ny][nx] == inf) {
                d[ny][nx] = d[p.first][p.second] + 1;
                qp.push(make_pair(ny, nx));
            }
        }
    }
    
    cout << d[gy][gx] << endl;
    
    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:12:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%s", c[i]);
                          ^

Judge Result