Submission #564805

#	Time	Username	Problem	Language	Result	Execution time	Memory
564805		AbdullahMW	Building Skyscrapers (CEOI19_skyscrapers)	C++14	54 / 100	704 ms	61832 KiB

skyscrapers

#include <bits/stdc++.h>
 
#define all(vec) vec.begin(), vec.end()
#define ll long long
#define db double
#define pb push_back
#define pf push_front
#define newl "\n"
#define fast ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define f first
#define s second
#define MOD 1000000007
 
using namespace std;
 
#pragma GCC diagnostic ignored "-Wunused-result"
void setIO(string name = "") {
    ios_base::sync_with_stdio(0); cin.tie(0);
    cout << fixed << setprecision(15);
    if (name.size()) {
        freopen((name+".in").c_str(), "r", stdin);
        freopen((name+".out").c_str(), "w", stdout);
    }
}
 
map <pair <ll, ll>, bool> vis, exist;
vector <ll> ans;
priority_queue <pair <ll, ll>, vector <pair <ll, ll>>, greater <pair <ll, ll>>> pq;
map <pair <ll, ll>, ll> mp;
void bfs(ll ii, ll jj)
{
    pq.push({ii, jj});
    vis[{ii, jj}] = true;

    while (pq.size())
    {
        ll x = pq.top().f, y = pq.top().s;
        pq.pop();
        
        for (ll i = x - 1; i <= x + 1; i++)
        {
            for (ll j = y - 1; j <= y + 1; j++)
            {
                if (exist[{i, j}] && !vis[{i, j}])
                {
                    vis[{i, j}] = true;
                    pq.push({i, j});
                }
            }
        }
        
        ans.pb(mp[{x, y}]);
    }
}
 
int main()
{
    //fast
    //setIO("");
    
    //freopen("filename.in", "r", stdin);
    //freopen("filename.out", "w", stdout);
    
    ll n, t; cin >> n >> t;
    vector <pair <ll, ll>> a(n);
    for (ll i = 0; i < n; i++) 
    {
        cin >> a[i].f >> a[i].s;
        mp[a[i]] = i + 1;
        exist[a[i]] = true;
    }
    
    sort(a.begin(), a.end());
    bfs(a[0].f, a[0].s);

    if (ans.size() < n) 
    {
        cout << "NO" << newl;
        return 0;
    }
    
    cout << "YES" << newl;
    for (auto v : ans) cout << v << newl;
    
    //cout << 1;
 
 
 
    
    
    
}

Compilation message (stderr)

skyscrapers.cpp: In function 'int main()':
skyscrapers.cpp:76:20: 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]
   76 |     if (ans.size() < n)
      |         ~~~~~~~~~~~^~~

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