Submission #564839

#	Time	Username	Problem	Language	Result	Execution time	Memory
564839		1zaid1	Building Skyscrapers (CEOI19_skyscrapers)	C++17	8 / 100	111 ms	9316 KiB

skyscrapers

#include <bits/stdc++.h>
using namespace std;
#define endl '\n'
#define int long long
typedef long long ll;
const int M = 2e6 + 5, MOD = 1e9+7;
struct point {int x, y, i;};
bool operator<(point a, point b) {if (a.x == b.x) return a.y < b.y; return a.x < b.x;}
vector<pair<int, int>> st = {{-1, -1}, {0, -1}, {1, -1}, {1, 0}, {1, 1}, {0, 1}, {-1, 1}, {-1, 0}};

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

    vector<int> ans;
    map<int, int> ok;
    vector<point> v(n);
    for (auto&i:v) cin >> i.x >> i.y;
    for (auto&[x, y, i]:v) i = ++ind;
    for (auto [x, y, i]:v) ok[x*2e9+y] = i;
    priority_queue<point> q;
    q.push(*min_element(v.begin(), v.end()));
    ok[min_element(v.begin(), v.end())->x*2e9+min_element(v.begin(), v.end())->y] = 0;
    while (!q.empty()) {
        ans.push_back(q.top().i);
        auto [x, y, k] = q.top(); q.pop();
        for (auto [i, j]:st) {
            if (ok[(x+i)*2e9+(y+j)]) {
                q.push({x+i, y+j, ok[(x+i)*2e9+(y+j)]});
                ok[(x+i)*2e9+(y+j)] = 0;
            }
        }
    }

    if (ans.size() == n) {
        cout << "YES" << endl;
        for (int i:ans) cout << i << endl;
    } else cout << "NO" << endl;

    return 0;
}

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

Compilation message (stderr)

skyscrapers.cpp: In function 'int main()':
skyscrapers.cpp:38:20: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   38 |     if (ans.size() == 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