Submission #1273144

#	Time	Username	Problem	Language	Result	Execution time	Memory
1273144		DeathIsAwe	Travelling Merchant (APIO17_merchant)	C++20	0 / 100	95 ms	2188 KiB

merchant

#include <bits/stdc++.h>
using namespace std;
#define ff first
#define ss second
#define pb push_back
#define pf push_front
#define mp make_pair
#define ll long long
#define int long long
int distgraph[100][100], profitgraph[100][100], dumbgraph[100][100], n, m, k;
pair<int,int> goods[100][1000];


bool checkans(int a) {
    for (int i=0;i<n;i++) {
        for (int j=0;j<n;j++) {
            dumbgraph[i][j] = distgraph[i][j] * a - profitgraph[i][j];
        }
        dumbgraph[i][i] = 1;
    }
    for (int i=0;i<n;i++) {
        for (int j=0;j<n;j++) {
            for (int l=0;l<n;l++) {
                dumbgraph[j][l] = min(dumbgraph[j][l], dumbgraph[j][i] + dumbgraph[i][l]);
            }
        }
    }
    for (int i=0;i<n;i++) {
        if (dumbgraph[i][i]<= 0) return true;
    }
    return false;
}


void distcalc() {
    for (int i=0;i<n;i++) {
        for (int j=0;j<n;j++) {
            for (int l=0;l<n;l++) {
                distgraph[j][l] = min(distgraph[j][l], distgraph[j][i] + distgraph[i][l]);
            }
        }
    }
}


int32_t main() {
    for (int i=0;i<100;i++) {
        for (int j=0;j<100;j++) {
            distgraph[i][j] = 1000000000000000000;
            profitgraph[i][j] = 0;
        }
    }
    cin >> n >> m >> k;
    for (int i=0;i<n;i++) {
        for (int j=0;j<k;j++) {
            cin >> goods[i][j].ff >> goods[i][j].ss;
        }
    }
    int d1, d2, d3;
    for (int i=0;i<m;i++) {
        cin >> d1 >> d2 >> d3;
        d1 -= 1; d2 -= 1;
        distgraph[d1][d2] = d3;
    }


    distcalc();
    for (int i=0;i<n;i++) {
        for (int j=0;j<n;j++) {
            for (int l=0;l<k;l++) {
                if (goods[i][l].ff == -1 || goods[j][l].ss == -1) continue;
                profitgraph[i][j] = max(profitgraph[i][j], goods[j][l].ss - goods[i][l].ff);
            }
        }
    }


    //for (int i=0;i<n;i++) {
    //    for (int j=0;j<n;j++) {
    //        cout << profitgraph[i][j] << ' ';
    //    } cout << '\n';
    //} cout << '\n';
    //for (int i=0;i<n;i++) {
    //    for (int j=0;j<n;j++) {
    //        cout << distgraph[i][j] << ' ';
    //    } cout << '\n';
    //} cout << '\n';


    int top = 1000000001, bottom = 0, mid;
    while (top > bottom + 1) {
        mid = (top + bottom) / 2;
        if (checkans(mid)) bottom = mid;
        else top = mid;
    }
    cout << bottom;
}

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