Submission #886080

#	Time	Username	Problem	Language	Result	Execution time	Memory
886080		VMaksimoski008	경주 (Race) (IOI11_race)	C++14	21 / 100	3029 ms	10844 KiB

race

#include <bits/stdc++.h>
#include "race.h"

#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()

using namespace std;
using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
using Node = array<int, 4>;

int best_path(int N, int K, int H[][2], int L[]) {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);

    int ans = 1e9;
    vector<vector<pii> > graph(N);
    for(int i=0; i<N-1; i++) {
        graph[H[i][0]].push_back({ H[i][1], L[i] });
        graph[H[i][1]].push_back({ H[i][0], L[i] });
    }

    for(int i=0; i<N; i++) {
        stack<Node> st;
        st.push({ i, 0, 0, 0 });

        while(!st.empty()) {
            Node nd = st.top();
            st.pop();

            if(nd[3] > K) continue;
            if(nd[3] == K) ans = min(ans, nd[2]);
            if(nd[2] + 1 >= ans) continue;

            for(auto &[v, w] : graph[nd[0]]) {
                if(v == nd[1]) continue;
                st.push({ v, nd[0], nd[2] + 1, nd[3] + w });
            }
        }
    }

    if(ans == 1e9) return -1;
    return ans;
}

// int32_t main() {
//     int n, k;
//     cin >> n >> k;

//     int g[n-1][2];
//     for(int i=0; i<n-1; i++) {
//         int a, b;
//         cin >> a >> b;
//         g[i][0] = a;
//         g[i][1] = b;
//     }

//     int len[n-1];
//     for(int i=0; i<n-1; i++) cin >> len[i];

//     cout << best_path(n, k, g, len) << '\n';
//     return 0;
// }

Compilation message (stderr)

race.cpp: In function 'int best_path(int, int, int (*)[2], int*)':
race.cpp:37:23: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   37 |             for(auto &[v, w] : graph[nd[0]]) {
      |                       ^

• Subtask 1: 9 / 9
• Subtask 2: 12 / 12
• Subtask 3: 0 / 22
• Subtask 4: 0 / 57