Submission #554643

#	Time	Username	Problem	Language	Result	Execution time	Memory
554643		Tien_Noob	Travelling Merchant (APIO17_merchant)	C++17	0 / 100	1085 ms	9824 KiB

merchant

//Make CSP great again
//Vengeance
#include <bits/stdc++.h>
#define TASK "TESTCODE"
#define Log2(x) 31 - __builtin_clz(x)
using namespace std;
const int N = 1e2, K = 1e3;
const long long oo = 1e11 + 1;
long long d[N + 1][K + 1];
int n, m, k, b[N + 1][K + 1], s[N + 1][K + 1];
vector<pair<int, int> > adj[N + 1];
void read()
{
    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 <= m; ++ i)
    {
        int u, v, w;
        cin >> u >> v >> w;
        adj[u].push_back({v, w});
        //adj[v].push_back({u, w});
    }
}
bool check(long long x)
{
    priority_queue<tuple<long long, int, int> > PQ;
    fill(&d[0][0], &d[0][0] + sizeof(d)/sizeof(d[0][0]), -oo);
    PQ.push(make_tuple(0, 1, 0));
    while(!PQ.empty())
    {
        long long r;
        int u, item;
        tie(r, u, item) = PQ.top();
        PQ.pop();
        if (d[1][0] >= 0)
        {
            return true;
        }
        if (d[u][item] > r)
        {
            continue;
        }
        //cerr << u << ' ' << r << ' ' << item << '\n';
        if (item != 0 && s[u][item] != -1)
        {
            long long money = min(oo, r + s[u][item]);
            if (d[u][0] < money)
            {
                d[u][0] = money;
                PQ.push(make_tuple(money, u, 0));
            }
        }
        if (item == 0)
        {
            for (int j = 1; j <= k; ++ j)
            {
                if (b[u][j] != -1)
                {
                    long long money = r - b[u][j];
                    if (d[u][j] < money)
                    {
                        d[u][j] = money;
                        PQ.push(make_tuple(money, u, j));
                    }
                }
            }
        }
        for (auto p : adj[u])
        {
            int v = p.first, w = p.second;
            if (d[v][item] < r - x * w)
            {
                d[v][item] = r - x * w;
                PQ.push(make_tuple(d[v][item], v, item));
            }
        }
    }
    return false;
}
void solve()
{
    int low = 1, high = 1e9;
    while(low <= high)
    {
        int mid = (low + high)/2;
        if (check(mid))
        {
            low = mid + 1;
        }
        else
        {
            high = mid - 1;
        }
    }
    cout << high;
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    if (fopen(TASK".INP", "r"))
    {
        freopen(TASK".INP", "r", stdin);
        //freopen(TASK".OUT", "w", stdout);
    }
    int t = 1;
    bool typetest = false;
    if (typetest)
    {
        cin >> t;
    }
    for (int __ = 1; __ <= t; ++ __)
    {
        //cout << "Case " << __ << ": ";
        read();
        solve();
    }
}

Compilation message (stderr)

merchant.cpp: In function 'int main()':
merchant.cpp:109:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  109 |         freopen(TASK".INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

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