Submission #200347

#	Time	Username	Problem	Language	Result	Execution time	Memory
200347		Rakhmand	Travelling Merchant (APIO17_merchant)	C++14	12 / 100	38 ms	2148 KiB

merchant

//
//  ROIGold.cpp
//  Main calisma
//
//  Created by Rakhman on 05/02/2019.
//  Copyright © 2019 Rakhman. All rights reserved.
//
#include <cstring>
#include <vector>
#include <list>
#include <map>
#include <set>
#include <deque>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <queue>
#include <cmath>
#include <cstdlib>
#include <ctime>
#include <cassert>
#include <iterator>

#define ios ios_base::sync_with_stdio(0), cout.tie(0), cin.tie(0);
#define S second
#define F first
#define pb push_back
#define nl '\n'
#define NL cout << '\n';
#define EX exit(0)
#define all(s) s.begin(), s.end()
#define FOR(i, start, finish, k) for(int i = start; i <= finish; i += k)

const int MXN = 1e5 + 10;
const long long MNN = 1e6 + 200;
const long long MOD = 1e9 + 7;
const long long INF = 1e18;
const int OO = 1e9 + 10;

typedef long long llong;
typedef unsigned long long ullong;

using namespace std;

void istxt(bool yes){
    if(yes == 1){
        freopen("balancing.in", "r", stdin);
        freopen("balancing.out", "w", stdout);
    }else{
        freopen("/Users/rakhmanabdirashov/Desktop/folder/Programming/Road2Master/Road2Master/input.txt", "r", stdin);
    }
}

int n, m, k;
llong b[110][1100], s[110][1100], mxx[110][110];
llong g[110][110];
llong mx[110][110];
//pair<llong, llong> dp[110];

int main () {
    ios;
    //istxt(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];
        }
    }
    for(int i = 1; i <= n; i++){
        for(int j = 1; j <= n; j++){
            g[i][j] = INF;
        }
        g[i][i] = 0;
    }
    for(int i = 1; i <= m; i++){
        int u, v, cost;
        cin >> u >> v >> cost;
        g[u][v] = cost;
    }
    for(int i = 1; i <= n; i++){
        for(int j = 1; j <= k; j++){
            if(b[i][j] != -1){
                for(int nx = 1; nx <= n; nx++){
                    if(i == nx) continue;
                    if(s[nx][j] != -1 && g[i][nx] != OO){
                        mx[i][nx] = max(mx[i][nx], s[nx][j] - b[i][j]);
                    }
                }
            }
        }
    }
    for(int k = 1; k <= n; k++){
        for(int i = 1; i <= n; i++){
            for(int j = 1; j <= n; j++){
                g[i][j] = min(g[i][j], g[i][k] + g[k][j]);
                if(g[i][k] + g[k][j] < g[i][j]){
                    g[i][j] = g[i][j] + g[k][j];
                    if(mx[i][j] < mx[i][k] + mx[k][j]){
                        mx[i][j] = mx[i][k] + mx[k][j];
                    }
                }
            }
        }
    }
    llong ans = 0;
    for(int i = 1; i <= n; i++){
        for(int j = 1; j <= n; j++){
            if(i != j)
                ans = max(ans, (mx[i][j] + mx[j][i]) / (g[i][j] + g[j][i]));
        }
    }
    cout << ans;
}

Compilation message (stderr)

merchant.cpp: In function 'void istxt(bool)':
merchant.cpp:54:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
         freopen("balancing.in", "r", stdin);
         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
merchant.cpp:55:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
         freopen("balancing.out", "w", stdout);
         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
merchant.cpp:57:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
         freopen("/Users/rakhmanabdirashov/Desktop/folder/Programming/Road2Master/Road2Master/input.txt", "r", stdin);
         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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