Submission #465638

#	Time	Username	Problem	Language	Result	Execution time	Memory
465638		MohamedFaresNebili	Portals (BOI14_portals)	C++14	0 / 100	1 ms	292 KiB

portals

#include <bits/stdc++.h>

using namespace std;

void solve()
{
    /// JUST KEEP GOING
    const int nx[4] = {0, 0, 1, -1}, ny[4] = {1, -1, 0, 0};
    int n, m; cin>>n>>m; char grid[n][m]; int d[n][m];
    set<int>v[n], h[m]; int sx, sy, ex, ey; bool vis[n][m];
    for(int l=0;l<n;l++) {
        for(int i=0;i<m;i++) {
            cin>>grid[l][i]; d[l][i]=1e9;
            char c=grid[l][i]; vis[l][i]=false;
            if(c=='S') { sx=l; sy=i; d[l][i]=0; }
            if(c=='C') { ex=l; ey=i; }
        }
    }
    queue<pair<int, int>>q; q.push({sx, sy});
    while(!q.empty()) {
        int a=q.front().first, b=q.front().second; q.pop();
        if(vis[a][b]) continue; vis[a][b]=true;
        for(int l=0;l<4;l++) {
            int x=a+nx[l], y=b+ny[l];
            if(x>=0&&x<n&&y>=0&&y<m) {
                if(vis[x][y]||grid[x][y]=='#') continue;
                d[x][y]=d[a][b]+1; q.push({x, y});
            }
        }
    }
    cout<<d[ex][ey]<<'\n'; return;
}

int32_t main()
{

    int t; t=1;
    while(t--) {
        solve();
    }
    return 0;
}

Compilation message (stderr)

portals.cpp: In function 'void solve()':
portals.cpp:22:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   22 |         if(vis[a][b]) continue; vis[a][b]=true;
      |         ^~
portals.cpp:22:33: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   22 |         if(vis[a][b]) continue; vis[a][b]=true;
      |                                 ^~~
portals.cpp:31:22: warning: 'ex' may be used uninitialized in this function [-Wmaybe-uninitialized]
   31 |     cout<<d[ex][ey]<<'\n'; return;
      |                      ^~~~
portals.cpp:31:22: warning: 'ey' may be used uninitialized in this function [-Wmaybe-uninitialized]

• Subtask 1: 0 / 11
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 19
• Subtask 5: 0 / 30