제출 #959435

#제출 시각아이디문제언어결과실행 시간메모리
959435AlperenT_여행하는 상인 (APIO17_merchant)C++14
45 / 100
177 ms21336 KiB
#include <bits/stdc++.h> #pragma GCC optimize("O3,unroll-loops") #define pb push_back #define F first #define S second #define ld long double #define int long long #define all(a) a.begin(),a.end() #define pii pair <int,int> #define sz(v) (int)v.size() #define rep(i , a , b) for(int i=a;i <= (b);i++) #define per(i , a , b) for(int i=a;i >= (b);i--) #define deb(x) cout <<#x << " : " << x << "\n" ; using namespace std ; mt19937 rng(chrono::steady_clock::now().time_since_epoch().count()); const int maxn = 202 + 10 , maxk = 1e4, sq = 1e5 , lg = 19, inf = 1e18+10 , mod = 998244353; int b[maxn][maxk] , s[maxn][maxk] , d[maxn][maxn] , w[maxn][maxn] , sp[maxn] , n; bool ch(int x){ rep(i , 1, n)sp[i] = 0 ; rep(i , 1 ,n+1){ rep(j , 1 ,n){ rep(k , 1 , n){ if(d[j][k] == inf)continue ; sp[k] = min(sp[k] , sp[j] + (-w[j][k] + d[j][k]*x)); } } } rep(j , 1, n){ rep(k , 1, n){ if(d[j][k] == inf)continue ; if(sp[k] > sp[j]+(-w[j][k]+d[j][k]*x))return 1 ; } } return 0 ; } signed main(){ ios_base::sync_with_stdio(false);cin.tie(0); int m , k ; cin >> n >> m >> k ; rep(i , 1, n){ rep(j , 1, k){ cin >> b[i][j] >> s[i][j] ; } } rep(i , 1, n){ rep(j , 1 , n){ w[i][j] = -inf ; if(i == j)continue ; w[i][j] = 0 ; rep(z , 1 , k){ if(b[i][z] == -1 || s[j][z] == -1)continue ; w[i][j] = max(w[i][j] , -b[i][z] + s[j][z]) ; } } } rep(i , 1, n){ rep(j , 1 ,n)d[i][j] = inf ; d[i][i] = 0; } while(m--){ int v, u , w ; cin >> v >> u >> w ; d[v][u] = min(d[v][u] , w); } rep(i ,1 ,n){ rep(j , 1, n){ rep(z, 1 , n){ d[j][z] = min(d[j][z] , d[j][i] + d[i][z]) ; } } } int l = 0, r =4e9 ; while(r-l>1){ int mid = (l+r)/2 ; if(ch(mid) == 1)l=mid ; else r = mid ; } rep(i , 1, n){ rep(j , 1, n){ sp[j] = inf ; } rep(j , 1, n){ if(j == i)continue ; sp[j] = (-w[i][j] + (l+1)*d[i][j]); } rep(i , 1 ,n+1){ rep(j , 1 ,n){ rep(k , 1 , n){ if(d[j][k] == inf)continue ; sp[k] = min(sp[k] , sp[j] + (-w[j][k] + d[j][k]*(l+1))); } } } bool ok =0 ; rep(j , 1 ,n){ rep(k , 1 , n){ if(d[j][k] == inf)continue ; if(sp[k] > sp[j] + (-w[j][k] + d[j][k]*(l+1)))ok = 1; } } if(ok == 1)continue ; if(sp[i] == 0){ cout << l+1 << "\n"; exit(0) ; } } cout << l << "\n"; return 0; } /* */
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