Submission #1117152

#	Time	Username	Problem	Language	Result	Execution time	Memory
1117152		ThegeekKnight16	Travelling Merchant (APIO17_merchant)	C++17	0 / 100	160 ms	9040 KiB

merchant

#include <bits/stdc++.h>
using namespace std;
#define int long long
const int INF = 0x3f3f3f3f3f3f3f3f;

int32_t main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int N, M, K;
    cin >> N >> M >> K;
    vector<vector<pair<int, int>>> items(N+1, vector<pair<int, int>>(K));
    for (int i = 1; i <= N; i++)
        for (auto &[B,S] : items[i]) {cin >> B >> S;}
    vector<vector<int>> maxDiff(N+1, vector<int>(N+1));
    for (int i = 1; i <= N; i++)
        for (int j = 1; j <= N; j++)
        {
            if (i == j) continue;
            for (int k = 0; k < K; k++)
            {
                auto [Bi, Si] = items[i][k];
                auto [Bj, Sj] = items[j][k];
                if (Bi == -1 || Sj == -1) continue;
                if (Bi > Sj) continue;
                maxDiff[i][j] = max(maxDiff[i][j], Sj - Bi);
            }
        }
    items.clear();

    vector<vector<int>> dist(N+1, vector<int>(N+1, INF));
    for (int i = 1; i <= M; i++)
    {
        int X, Y, P;
        cin >> X >> Y >> P;
        dist[X][Y] = min(dist[X][Y], P);
    }
    for (int i = 1; i <= N; i++) dist[i][i] = 0;

    for (int k = 1; k <= N; k++)
        for (int i = 1; i <= N; i++)
            for (int j = 1; j <= N; j++)
                dist[i][j] = min(dist[i][j], dist[i][k] + dist[k][j]);

    // int resp = 0;
    // for (int i = 2; i <= N; i++)
    //     resp = max(resp, maxDiff[1][i] / (dist[1][i] + dist[i][1]));
    // cout << resp << '\n';

    vector<vector<vector<int>>> dp(N+1, vector<vector<int>>(N+1, vector<int>(N+1, -INF)));
    for (int i = 1; i <= N; i++) dp[0][i][i] = 0;
    for (int t = 1; t <= N; t++)
        for (int fim = 1; fim <= N; fim++)
            for (int ini = 1; ini <= N; ini++)
                for (int prox = 1; prox <= N; prox++)
                {
                    if (prox == ini || dist[ini][prox] > t) continue;
                    dp[t][fim][ini] = max(dp[t][fim][ini], dp[t-dist[ini][prox]][fim][prox] + maxDiff[ini][prox]);
                }

    int resp = 0;
    for (int t = 1; t <= N; t++)
        for (int i = 1; i <= N; i++)
            resp = max(resp, (dp[t][i][i] / t));
    cout << resp << '\n';
}

• Subtask 1: 0 / 12
• Subtask 2: 0 / 21
• Subtask 3: 0 / 33
• Subtask 4: 0 / 34