Submission #779954

#	Time	Username	Problem	Language	Result	Execution time	Memory
779954		horiiseun	Travelling Merchant (APIO17_merchant)	C++17	100 / 100	74 ms	4188 KiB

merchant

#include <iostream>
#include <vector>
#include <tuple>
#include <queue>
#include <stack>
#include <deque>
#include <set>
#include <map>
#include <cmath>
#include <random>
#include <string>
#include <bitset>
#include <cassert>
#include <climits>
#include <algorithm>
#include <unordered_set>
#include <unordered_map>
using namespace std;
 
#define ll long long
#define f first
#define s second
 
void __print(int x) { cerr << x; }
void __print(long x) { cerr << x; }
void __print(long long x) { cerr << x; }
void __print(unsigned x) { cerr << x; }
void __print(unsigned long x) { cerr << x; }
void __print(unsigned long long x) { cerr << x; }
void __print(float x) { cerr << x; }
void __print(double x) { cerr << x; }
void __print(long double x) { cerr << x; }
void __print(char x) { cerr << '\'' << x << '\''; }
void __print(const char *x) { cerr << '\"' << x << '\"'; }
void __print(const string &x) { cerr << '\"' << x << '\"'; }
void __print(bool x) { cerr << (x ? "true" : "false"); }
 
template<typename A> void __print(const A &x);
template<typename A, typename B> void __print(const pair<A, B> &p);
template<typename... A> void __print(const tuple<A...> &t);
template<typename T> void __print(stack<T> s);
template<typename T> void __print(queue<T> q);
template<typename T, typename... U> void __print(priority_queue<T, U...> q);
 
template<typename A> void __print(const A &x) {
    bool first = true;
    cerr << '{';
    for (const auto &i : x) {
        cerr << (first ? "" : ","), __print(i);
        first = false;
    }
    cerr << '}';
}
 
template<typename A, typename B> void __print(const pair<A, B> &p) {
    cerr << '(';
    __print(p.f);
    cerr << ',';
    __print(p.s);
    cerr << ')';
}
 
template<typename... A> void __print(const tuple<A...> &t) {
    bool first = true;
    cerr << '(';
    apply([&first] (const auto &...args) { ((cerr << (first ? "" : ","), __print(args), first = false), ...); }, t);
    cerr << ')';
}
 
template<typename T> void __print(stack<T> s) {
    vector<T> debugVector;
    while (!s.empty()) {
        T t = s.top();
        debugVector.push_back(t);
        s.pop();
    }
    reverse(debugVector.begin(), debugVector.end());
    __print(debugVector);
}
 
template<typename T> void __print(queue<T> q) {
    vector<T> debugVector;
    while (!q.empty()) {
        T t = q.front();
        debugVector.push_back(t);
        q.pop();
    }
    __print(debugVector);
}
 
template<typename T, typename... U> void __print(priority_queue<T, U...> q) {
    vector<T> debugVector;
    while (!q.empty()) {
        T t = q.top();
        debugVector.push_back(t);
        q.pop();
    }
    __print(debugVector);
}
 
void _print() { cerr << "]\n"; }
 
template <typename Head, typename... Tail> void _print(const Head &H, const Tail &...T) {
    __print(H);
    if (sizeof...(T)) cerr << ", ";
    _print(T...);
}
 
#ifdef DEBUG
	#define D(...) cerr << "Line: " << __LINE__ << " [" << #__VA_ARGS__ << "] = ["; _print(__VA_ARGS__)
#else
    #define D(...)
#endif

int n, m, k;
ll b[105][1005], s[105][1005], t[105][105], p[105][105], g[105][105], lf, rh, md;

int main() {

    ios_base::sync_with_stdio(false);
    cin.tie(0);

    cin >> n >> m >> k;
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= k; j++) {
            cin >> b[i][j] >> s[i][j];
        }
    }
    fill(&t[0][0], &t[0][0] + sizeof(t) / sizeof(t[0][0]), 1e18);
    for (int i = 0, a, x, c; i < m; i++) {
        cin >> a >> x >> c;
        t[a][x] = c;
    }

    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= n; j++) {
            for (int a = 1; a <= n; a++) {
                t[j][a] = min(t[j][a], t[j][i] + t[i][a]);
            }
            for (int a = 1; a <= k; a++) {
                if (b[i][a] != -1 && s[j][a] != -1) {
                    p[i][j] = max(p[i][j], s[j][a] - b[i][a]);
                }
            }
        }
    }

    lf = 1, rh = 1e9;
    while (lf <= rh) {
        md = (lf + rh) / 2;
        for (int i = 1; i <= n; i++) {
            for (int j = 1; j <= n; j++) {
                g[i][j] = md * min(t[i][j], (ll) 1e18 / md) - p[i][j];
            }
        }
        for (int i = 1; i <= n; i++) {
            for (int j = 1; j <= n; j++) {
                for (int a = 1; a <= n; a++) {
                    g[j][a] = min(g[j][a], g[j][i] + g[i][a]);
                }
            }
        }
        bool good = false;
        for (int i = 1; i <= n; i++) {
            if (g[i][i] <= 0) {
                good = true;
            }
        }
        if (good) lf = md + 1;
        else rh = md - 1;
    }

    cout << rh << "\n";

}

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