Submission #1126078

#	Time	Username	Problem	Language	Result	Execution time	Memory
1126078		m_bezrutchka	Dreaming (IOI13_dreaming)	C++20	10 / 100	18 ms	1500 KiB

dreaming

#include "dreaming.h"
#include <bits/stdc++.h>
using namespace std;

typedef pair<int, int> pii;

const int MAXN = 1e2 + 10;
const int INF = 2e9 + 10;
vector<pii> adj[MAXN];
bool mrk[MAXN];
int dist[MAXN][MAXN];
int max_dist[MAXN];
int n, resp, diam;

void dfs(int s, int v) {
    mrk[v] = true;
    for (auto [w, c]: adj[v]) {
        if (mrk[w]) continue;
        dist[s][w] = dist[s][v] + c;
        dfs(s, w);
    }
}

void build_dist(int v) {
    for (int i = 0; i < n; i++) {
        dist[v][i] = -INF;
        mrk[i] = false;
    }
    dist[v][v] = 0;
    dfs(v, v);
    max_dist[v] = 0;
    for (int i = 0; i < n; i++) {
        max_dist[v] = max(max_dist[v], dist[v][i]);
    }
    diam = max(diam, max_dist[v]);
}


int travelTime(int N, int M, int L, int A[], int B[], int T[]) {
    // subtask 3
    // assert(M == N - 2);
    n = N;
    resp = 2e9 + 10;
    for (int i = 0; i < n; i++) {
        adj[i].clear();
    }
    for (int i = 0; i < M; i++) {
        adj[A[i]].push_back({B[i], T[i]});
        adj[B[i]].push_back({A[i], T[i]});
    }

    for (int i = 0; i < n; i++) {
        build_dist(i);
    }

    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            if (dist[i][j] != -INF) continue;
            resp = min(resp, max_dist[i] + max_dist[j] + L);
        }
    }
    return max(diam, resp);
}

• Subtask 1: 0 / 14
• Subtask 2: 10 / 10
• Subtask 3: 0 / 23
• Subtask 4: 0 / 18
• Subtask 5: 0 / 12
• Subtask 6: 0 / 23