Submission #564444

#	Time	Username	Problem	Language	Result	Execution time	Memory
564444		1zaid1	Building Skyscrapers (CEOI19_skyscrapers)	C++17	0 / 100	662 ms	952708 KiB

skyscrapers

#include <bits/stdc++.h>
using namespace std;
#define endl '\n'
#define int long long
typedef long long ll;
const int M = 2e7 + 5, MOD = 1e9+7;
int grid[3000][3000], vis[M], cnt;
vector<int> node[M];

vector<int> ans;
void dfs(int s) {
    ans.push_back(s);
    vis[s] = true;
    cnt++;
    for (int i:node[s]) {
        if (!vis[i]) dfs(i);
    }
}

signed main() {
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    srand(time(0));
    
    int n, t;
    cin >> n >> t;

    vector<pair<int, int>> v(n);
    for (auto&[a, b]:v) {
        cin >> a >> b;
        a += 1000;
        b += 1000;
    }

    for (int i = 0; i < n; i++) {
        grid[v[i].first][v[i].second] = i+1;
    }

    int ind = 1;
    for (auto[a, b]:v) {
        for (int i = -1; i <= 1; i++) {
            for (int j = -1; j <= 1; j++) {
                if (!i && !j) continue;
                if (grid[a+i][b+j]) node[ind].push_back(grid[a+i][b+j]);
            }
        }

        ind++;
    }

    for (int i = 1; i <= n; i++) {
        sort(node[i].rbegin(), node[i].rend());
    }

    dfs(n);
    reverse(ans.begin(), ans.end());
    if (cnt == n) {
        cout << "YES" << endl;
        for (int i:ans) cout << i << endl;
    } else cout << "NO" << endl;

    return 0;
}

/*
3
2 1 2
0
0 
3
1 2
1 1
2 2

4
1 1 1 4

*/

• Subtask 1: 0 / 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