제출 #401272

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
401272		amunduzbaev	Travelling Merchant (APIO17_merchant)	C++14	100 / 100	139 ms	4188 KiB

merchant

/* made by amunduzbaev */
 
#include <bits/stdc++.h>
 
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
 
using namespace std;
//using namespace __gnu_pbds;
 
#define ff first
#define vv vector
#define ss second
#define pb push_back
#define mp make_pair
#define ub upper_bound
#define lb lower_bound
#define sz(x) (int)x.size()
#define tut(x) array<int, x> 
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(),x.rend()
#define NeedForSpeed ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define int long long
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii; 
typedef vector<int> vii;
typedef vector<pii> vpii;
 
template<class T> bool umin(T& a, const T& b) { return a > b? a = b, true:false; }
template<class T> bool umax(T& a, const T& b) { return a < b? a = b, true:false; }
//void usaco(string s) { freopen((s+".in").c_str(),"r",stdin);  
	//freopen((s+".out").c_str(),"w",stdout); }
//template<class T> tree<T, 
//less<T>, null_type, rb_tree_tag, 
//tree_order_statistics_node_update> ordered_set;
 
const int N = 105;
const int mod = 1e9+7;
const ll inf = 1e16;
const ld Pi = acos(-1);
 
#define MULTI 0
int n, m, k, ans, q, res, a[N];
int b[N][1005], s[N][1005];
int tt[N][N], prof[N][N];
int mx[N][N];

bool check(int m){
	for(int i=1;i<=n;i++){
		for(int j=1;j<=n;j++){
			mx[i][j] = -inf;
			if(tt[i][j] == inf || i == j) continue;
			mx[i][j] = prof[i][j] - m * tt[i][j];
		}
	}
	
	for(int k=1;k<=n;k++){
		for(int i=1;i<=n;i++){
			for(int j=1;j<=n;j++){
				umax(mx[i][j], mx[i][k] + mx[k][j]);
			}
		}
	}
	
	for(int i=1;i<=n;i++) if(mx[i][i] >= 0) return 1;
	return 0;
}

void solve(int t_case){
	cin>>n>>m>>k;
	for(int i=1;i<=n;i++){
		for(int j=0;j<k;j++){
			cin>>b[i][j]>>s[i][j];
		}
	} for(int i=1;i<=n;i++) for(int j=1;j<=n;j++) tt[i][j] = inf;
	for(int i=0;i<m;i++){
		int a, b, c; cin>>a>>b>>c; 
		umin(tt[a][b], c);
	} int K = k;
	for(int k=1;k<=n;k++){
		for(int i=1;i<=n;i++){
			for(int j=1;j<=n;j++){
				umin(tt[i][j], tt[i][k] + tt[k][j]);
			}
			for(int j=0;j<K;j++){
				if(~b[i][j] && ~s[k][j])
					umax(prof[i][k], - b[i][j] + s[k][j]);
			}
		}
	} 
	int l = 0, r = mod;
	while(l < r){
		int m = (l + r + 1)>>1;
		if(check(m)) l = m;
		else r = m-1;
	} cout<<l<<"\n";
}

signed main(){ 
	
	NeedForSpeed
	if(!MULTI) {
		solve(1);
	} else {
		int t; cin>>t;
		for(int t_case = 1; t_case <= t; t_case++) solve(t_case);
	} return 0;
}

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