Submission #1060075

#	Time	Username	Problem	Language	Result	Execution time	Memory
1060075		dozer	Closing Time (IOI23_closing)	C++17	0 / 100	211 ms	23440 KiB

closing

#include "closing.h"
#include <bits/stdc++.h>
using namespace std;
#define sp " " 
#define endl "\n"
#define fastio() cin.tie(0), ios_base::sync_with_stdio(0)
#define fileio() freopen("input.txt", "r", stdin), freopen("output.txt", "w", stdout)
#define pb push_back
#define pii pair<int, int>
#define st first
#define nd second
#define LL node * 2
#define RR node * 2 + 1
#define ll long long

const int modulo = 1e9 + 7;
const ll INF = 2e18 + 7;


int max_score(int N, int X, int Y, long long K, vector<int> U, vector<int> V, vector<int> W)
{
    vector<pii> adj[N + 5];
    vector<ll> dist1(N, -1), dist2(N, -1);
    for (ll i = 0; i < N - 1; i++){
        adj[U[i]].pb({V[i], W[i]});
        adj[V[i]].pb({U[i], W[i]});
    }

    priority_queue<pair<ll, ll>> q;
    q.push({0, X});

    while(!q.empty()){
        pii tmp = q.top();
        q.pop();
        ll top = tmp.nd, d = -tmp.st;
        dist1[top] = d;
        for (auto i : adj[top]){
            ll v = i.st, w = i.nd;
            if (dist1[v] != -1) continue;
            q.push({-(d + w), v});
        }
    }

     q.push({0, Y});

     ll ans = 0;

    while(!q.empty()){
        pii tmp = q.top();
        q.pop();
        ll top = tmp.nd, d = -tmp.st;
        dist2[top] = d;
        for (auto i : adj[top]){
            ll v = i.st, w = i.nd;
            if (dist2[v] != -1) continue;
            q.push({-(d + w), v});
        }
    }

    for(ll i = 0; i < (1<<N); i++){
        vector<ll> v;
        ll sum = 0, res = 0;
        for (ll j = 0; j < N; j++){
            if (i & (1<<j)){
                res++;
                sum += min(dist1[j], dist2[j]);
                v.pb(max(dist1[j], dist2[j]) - min(dist1[j], dist2[j]));
            }
        }

        sort(v.begin(), v.end());
        ll it = 0;
        while(it < v.size() && sum + v[it] <= K) sum += v[it], res++, it++;
        if (sum <= K) ans = max(ans, res);
    }
    return ans;
}
/*

int main()
{
    fileio();
    int Q;
    assert(1 == scanf("%d", &Q));

    std::vector<int> N(Q), X(Q), Y(Q);
    std::vector<long long> K(Q);
    std::vector<std::vector<int>> U(Q), V(Q), W(Q);

    for (int q = 0; q < Q; q++)
    {
        assert(4 == scanf("%d %d %d %lld", &N[q], &X[q], &Y[q], &K[q]));

        U[q].resize(N[q] - 1);
        V[q].resize(N[q] - 1);
        W[q].resize(N[q] - 1);
        for (int i = 0; i < N[q] - 1; ++i)
        {
            assert(3 == scanf("%d %d %d", &U[q][i], &V[q][i], &W[q][i]));
        }
    }
    fclose(stdin);

    std::vector<int> result(Q);
    for (int q = 0; q < Q; q++)
    {
        result[q] = max_score(N[q], X[q], Y[q], K[q], U[q], V[q], W[q]);
    }

    for (int q = 0; q < Q; q++)
    {
        printf("%d\n", result[q]);
    }
    fclose(stdout);

    return 0;
}
*/

Compilation message (stderr)

closing.cpp: In function 'int max_score(int, int, int, long long int, std::vector<int>, std::vector<int>, std::vector<int>)':
closing.cpp:73:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   73 |         while(it < v.size() && sum + v[it] <= K) sum += v[it], res++, it++;
      |               ~~~^~~~~~~~~~

• Subtask 0: 0 / 0
• Subtask 1: 0 / 8
• Subtask 2: 0 / 9
• Subtask 3: 0 / 12
• Subtask 4: 0 / 14
• Subtask 5: 0 / 9
• Subtask 6: 0 / 11
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 17