Submission #632508

#	Time	Username	Problem	Language	Result	Execution time	Memory
632508		mansur	Travelling Merchant (APIO17_merchant)	C++17	12 / 100	19 ms	6996 KiB

merchant

//#pragma GCC target( "sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
//#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math,O3")

#include<bits/stdc++.h>	

using namespace std;
 
#define all(a) a.begin(), a.end()                                                   
#define rall(a) a.rbegin(), a.rend()                 
#define sz(a) a.size()
#define pb push_back
#define vt vector
#define s second
#define f first
#define nl '\n'
 
using ll = long long;
using pii = pair<int, int>;
 
vt<pii> dir = {{1, 0}, {-1, 0}, {0, 1}, {0, -1}};
 
const int N = 1e5 + 5, mod = 1e9 + 7;

const int inf = 2e9;
 
double eps = 1e-6;
                        
bool fl = 0;

vt<pii> g[N], g2[N];

void slv() {
	int n, m, k;
	cin >> n >> m >> k;
	int b[n + 1][k + 1];
	int sl[n + 1][k + 1];
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= k; j++) {
			cin >> b[i][j] >> sl[i][j];
		}
	}
	while (m--) {
		int u, v, w;
		cin >> u >> v >> w;
		g[u].pb({v, w});
		g2[v].pb({u, w});
	}
	set<pii> s;
	vt<int> d1(n + 1, inf);
	d1[1] = 0;
	s.insert({0, 1});
	while (!s.empty()) {
		int u = (*s.begin()).s;
		s.erase(s.begin());
		for (pii to: g[u]) {
			if (d1[to.f] > d1[u] + to.s) {
				s.erase({d1[to.f], to.f});
				d1[to.f] = d1[u] + to.s;
				s.insert({d1[to.f], to.f});
			}
	   	}
	}
	vt<int> d2(n + 1, inf);
	d2[1] = 0;
	s.insert({0, 1});
	while (!s.empty()) {
		int u = (*s.begin()).s;
		s.erase(s.begin());
		for (pii to: g2[u]) {
			if (d2[to.f] > d2[u] + to.s) {
				s.erase({d2[to.f], to.f});
				d2[to.f] = d2[u] + to.s;
				s.insert({d2[to.f], to.f});
			}
	   	}
	}
	int ans = 0;
	for (int i = 1; i <= k; i++) {
		if (b[1][i] == -1) continue;
		for (int j = 2; j <= n; j++) {  	
			if (sl[j][i] <= b[1][i]) continue;
			ans = max(ans, (sl[j][i] - b[1][i]) / (d1[j] + d2[j]));
        }
	}
	cout << ans;
}           
 
int main() {                                                         
	//freopen("codes.in", "r", stdin);                                                                                     
	//freopen("codes.out", "w", stdout);                                                                                     
	ios_base::sync_with_stdio(NULL);                                                                                       
	cin.tie(NULL);
	int tp = 1;
	if (fl) cin >> tp;
	while (tp--) {
		slv();
	}
}

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