Submission #591720

#	Time	Username	Problem	Language	Result	Execution time	Memory
591720		piOOE	Travelling Merchant (APIO17_merchant)	C++17	100 / 100	113 ms	3276 KiB

merchant

//#define _GLIBCXX_DEBUG

//#pragma GCC optimize("Ofast")
//#pragma GCC optimize("unroll-loops")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")

#include <bits/stdc++.h>

using namespace std;

//#include <ext/pb_ds/assoc_container.hpp>
//
//using namespace __gnu_pbds;
//
//template<typename T>
//using ordered_set = tree<T, null_type, less < T>, rb_tree_tag, tree_order_statistics_node_update>;

template<typename T>
using normal_queue = priority_queue<T, vector<T>, greater<>>;

mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());

#define trace(x) cout << #x << ": " << (x) << endl;
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
#define uniq(x) x.resize(unique(all(x)) - begin(x))
#define ld long double
#define sz(s) ((int) size(s))
#define pii pair<int, int>
#define mp(x, y) make_pair(x, y)
#define int128 __int128
#define pb push_back
#define eb emplace_back
#define fi first
#define se second
#define itn int

typedef long long ll;

template<typename T>
bool ckmn(T &x, T y) {
    if (x > y) {
        x = y;
        return true;
    }
    return false;
}

template<typename T>
bool ckmx(T &x, T y) {
    if (x < y) {
        x = y;
        return true;
    }
    return false;
}

int bit(int x, int b) {
    return (x >> b) & 1;
}

int rand(int l, int r) { return (int) ((ll) rnd() % (r - l + 1)) + l; }

const ll infL = 3e18;
const int infI = 1000000000 + 7;
const int infM = 2139062143;
const ll infML = 9187201950435737471LL;
const int maxN = 101, maxK = 1001;
const ll mod = 998244353;
const ld eps = 1e-9;

int N, M, K, b[maxN][maxK], s[maxN][maxK], mx[maxN][maxN];
ll d[maxN][maxN], dist[maxN][maxN];

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cin >> N >> M >> K;
    for (int i = 0; i < N; ++i) {
        for (int j = 0; j < K; ++j) {
            cin >> b[i][j] >> s[i][j];
        }
        fill(dist[i], dist[i] + N, infI);
        dist[i][i] = 0;
    }
    for (int i = 0; i < M; ++i) {
        int a, v, w;
        cin >> a >> v >> w;
        --a, --v;
        dist[a][v] = w;
    }
    for (int k = 0; k < N; ++k)
        for (int i = 0; i < N; ++i)
            for (int j = 0; j < N; ++j)
                if (dist[i][k] < infI && dist[k][j] < infI)
                    ckmn(dist[i][j], dist[i][k] + dist[k][j]);
    for (int i = 0; i < N; ++i) {
        for (int j = 0; j < N; ++j) {
            for (int k = 0; k < K; ++k) {
                if (b[i][k] != -1 && s[j][k] != -1)
                    ckmx(mx[i][j], s[j][k] - b[i][k]);
            }
        }
    }
    int l = 0, r = infI;
    while (l + 1 < r) {
        int mid = (l + r) >> 1;
        for (int i = 0; i < N; ++i) {
            for (int j = 0; j < N; ++j) {
                d[i][j] = infL;
                if (i != j && dist[i][j] < infI) {
                    d[i][j] = dist[i][j] * 1LL * mid - mx[i][j];
                }
            }
        }
        for (int k = 0; k < N; ++k) {
            for (int i = 0; i < N; ++i) {
                for (int j = 0; j < N; ++j) {
                    if (d[i][k] < infL && d[k][j] < infL)
                        ckmn(d[i][j], d[i][k] + d[k][j]);
                }
            }
        }
        bool ok = false;
        for (int i = 0; i < N; ++i) {
            if (d[i][i] <= 0) {
                ok = true;
            }
        }
        if (ok) l = mid;
        else r = mid;
    }
    cout << l;
    return 0;
}

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