Submission #563375

#	Time	Username	Problem	Language	Result	Execution time	Memory
563375		hoanghq2004	Building Skyscrapers (CEOI19_skyscrapers)	C++14	8 / 100	183 ms	10140 KiB

skyscrapers

#include <bits/stdc++.h>

using namespace std;

int n, T;
map <pair <int, int>, int> mp, vis;

int dx[8] = {0, 1, 0, -1, 1, -1, 1, -1};
int dy[8] = {1, 0, -1, 0, 1, 1, -1, -1};

int main() {
//    freopen("test.inp", "r", stdin);
    ios :: sync_with_stdio(0); cin.tie(0);
    cin >> n >> T;
    vector <pair <int, int> > P;
    int X = 0, Y = 0;
    for (int i = 1; i <= n; ++i) {
        int x, y;
        cin >> x >> y;
        mp[{x, y}] = i;
        X = x, Y = y;
    }
    queue <pair <int, int> > q;
    q.push({X, Y});
    vis[{X, Y}] = 1;
    vector <int> ans;
    while (q.size()) {
        int x = q.front().first;
        int y = q.front().second;
        ans.push_back(mp[{x, y}]);
        q.pop();
        for (int i = 0; i < 8; ++i) {
            int u = x + dx[i];
            int v = y + dy[i];
            if (mp.find({u, v}) == mp.end() || vis[{u, v}]) continue;
            vis[{u, v}] = 1;
            q.push({u, v});
        }
    }
    if (ans.size() != n) {
        cout << "NO\n";
        exit(0);
    }
    cout << "YES\n";
    for (int i = 0; i < ans.size(); ++i) cout << ans[i] << '\n';
}

Compilation message (stderr)

skyscrapers.cpp: In function 'int main()':
skyscrapers.cpp:40:20: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   40 |     if (ans.size() != n) {
      |         ~~~~~~~~~~~^~~~
skyscrapers.cpp:45:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |     for (int i = 0; i < ans.size(); ++i) cout << ans[i] << '\n';
      |                     ~~^~~~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 0 / 14
• Subtask 3: 0 / 12
• Subtask 4: 0 / 17
• Subtask 5: 0 / 20
• Subtask 6: 0 / 10
• Subtask 7: 0 / 19