제출 #869804

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
869804		gutzzy	여행하는 상인 (APIO17_merchant)	C++14	0 / 100	666 ms	43196 KiB

merchant

#include <bits/stdc++.h>
using namespace std;

vector<vector<pair<int,int>>> items;
vector<vector<pair<int,int>>> lst;
vector<int> visited;
vector<pair<vector<int>,int>> ans;
int n;

void dfs(int nodo, vector<int> cur, int d){
    visited[nodo] += 1;
    for(auto vecino:lst[nodo]){
        if(vecino.first==0){
            d += vecino.second;
            ans.push_back({cur,d});
            //for(auto a:cur) cout << a << " ";
            //cout << endl;
            //cout << "d: " << d << endl;
            return;
        }
        if(visited[vecino.first]>n-1) continue;
        cur.push_back(vecino.first);
        dfs(vecino.first, cur, d+vecino.second);
        cur.pop_back();
    }
    
}

int main(){
    int m,k,v,w,t;
    cin >> n >> m >> k;
    // items --> vector[market][item][0-->buy / 1-->sell]
    items = vector<vector<pair<int,int>>>(n,vector<pair<int,int>>(k));
    lst = vector<vector<pair<int,int>>>(m,vector<pair<int,int>>());
    
    for(int i=0;i<n;i++){
        for(int j=0;j<k;j++){
            cin >> items[i][j].first >> items[i][j].second;
        }
    }
    for(int i=0;i<m;i++){
        cin >> v >> w >> t;
        lst[v-1].push_back({w-1,t});
    }
    
    // busco cíclos
    
    visited = vector<int>(n,0);
    dfs(0, {0}, 0);
    
    int res = 0;
    
    for(auto p:ans){
        //cout << p.second << endl;
        vector<int> v = p.first;
        int profit = 0;
        for(int item=0;item<k;item++){
            // para cada item, buscamos el max provecho
            if(items[0][item].first==-1) continue;
            for(int market:v){
                if(items[market][item].second==-1) continue;
                profit = max(profit, items[market][item].second-items[0][item].first);
            }
        }
        res = max(res, profit/p.second);
    }
    cout << res << endl;
}

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