제출 #743450

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
743450		vjudge1	Travelling Merchant (APIO17_merchant)	C++17	0 / 100	176 ms	3504 KiB

merchant

// #pragma GCC target( "sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
// #pragma GCC optimize("Ofast,unroll-loops,fast-math,O3")  
#include<bits/stdc++.h>
#define f first
#define s second
#define pb push_back
#define sz(x) (int)x.size()
#define bit(a, i) ((a>>i)&1)

using namespace std;
typedef long long ll;
typedef pair<int, int> pii;

const int K = 210;
const ll inf = 1e18;
const int mod = 1e9 + 7;
const int maxn = 1e3 + 100;

int n, m, k;
ll d[maxn][maxn];
ll b[maxn][maxn];
ll c[maxn][maxn];
ll s[maxn][maxn];
ll d1[maxn][maxn];
ll d2[maxn][maxn];

int add(ll a, ll b){
    return (a+b)%mod;
}

bool ok(int x){
	for(int i=1; i<=n; i++){
		for(int j=1; j<=n; j++){
			if(d[i][j] == inf || i == j){
				d1[i][j] = inf;
				continue; 
			}
			d1[i][j] = x*1ll*d[i][j]-c[i][j];
		}
	}
	for(int k=1; k<=n; k++){
		for(int i=1; i<=n; i++){
			for(int j=1; j<=n; j++){
				if(max(d1[i][k], d1[k][j]) == inf) continue;
				d1[i][j] = max(-inf, min(d1[i][j], d1[i][k]+d1[k][j]));
			}
		}
	}
	for(int i=1; i<=n; i++){
		for(int j=1; j<=n; j++){
			d2[i][j] = d1[i][j];
		}
	}
	for(int k=1; k<=n; k++){
		for(int i=1; i<=n; i++){
			for(int j=1; j<=n; j++){
				if(max(d1[i][k], d1[k][j]) == inf) continue;
				d1[i][j] = max(-inf, min(d1[i][j], d1[i][k]+d1[k][j]));
			}
		}
	}
	for(int i=1; i<=n; i++){
		for(int j=1; j<=n; j++){
			if(d1[i][j] != d2[i][j]) return 1; 
		}
	}
	for(int i=1; i<=n; i++){
		if(d[i][i] <= 0) return 1;
	}
	return 0;
}	

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.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(d[i], d[i]+n+1, inf);
    	d[i][i] = 0;
    }
    for(int i=1; i<=n; i++){
    	for(int j=1; j<=n; j++){
    		for(int l=1; l<=k; l++){
    			if(b[i][l] == -1 || s[j][l] == -1) continue;
    			c[i][j] = max(c[i][j], s[j][l]-b[i][l]); 
    		}
    	}
    }
    for(int i=1; i<=m; i++){
    	int u, v, w;
    	cin >> u >> v >> w;
    	d[u][v] = min(d[u][v], w*1ll);
    }
    for(int k=1; k<=n; k++){
    	for(int i=1; i<=n; i++){
    		for(int j=1; j<=n; j++){
    			if(max(d[i][k], d[k][j]) < inf){
    				d[i][j] = min(d[i][j], d[i][k]+d[k][j]);
    			}
    		}
    	}
    }
    int ans = 0;
    for(int l=1, r=1e9; l<=r;){
    	int mid = (l+r)>>1;
    	if(!ok(mid)) r = mid - 1;
    	else l = mid + 1, ans = mid;
    }
    cout << ans;
}

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