Submission #908060

#	Time	Username	Problem	Language	Result	Execution time	Memory
908060		Alfraganus	Two Currencies (JOI23_currencies)	C++17	10 / 100	68 ms	14696 KiB

currencies

#pragma GCC optimize("unroll-loops")
#pragma gcc optimize("Ofast")
#pragma GCC optimization("Ofast")
#pragma optimize(Ofast)
#include <bits/stdc++.h>
using namespace std;

#define int long long
#define str string
#define fastio ios::sync_with_stdio(0), cin.tie(0);
#define fs first
#define ss second
#define endl '\n'
#define all(x) (x).begin(), (x).end()
#define len(x) x.size()

#define print(a)          \
    for (auto &x : a)     \
        cout << x << " "; \
    cout << endl;

#define printmp(a)    \
    for (auto &x : a) \
        cout << x.fs << " " << x.ss << endl;

const int mod = 998244353;

vector<vector<pair<int, int>>> tree;
vector<int> degree, c;
vector<pair<int, int>> p;
vector<vector<int>> k;
bitset<2001> used;

void dfs(int n){
    used[n] = 1;
    for(auto &x : tree[n]){
        if(!used[x.fs]){
            p[x.fs] = {n, x.ss};
            degree[x.fs] = degree[n] + 1;
            dfs(x.fs);
        }
    }
}

void dfs(int s, int t){
    if(s == t)
        return;
    if(degree[s] >= degree[t]){
        for(auto x : k[p[s].ss])
            c.push_back(x);
        dfs(p[s].fs, t);
    }
    else{
        for(auto x : k[p[t].ss])
            c.push_back(x);
        dfs(s, p[t].fs);
    }
}

void solve(){
    int n, m, q;
    cin >> n >> m >> q;
    tree.resize(n + 1);
    for(int i = 0; i < n - 1; i ++){
        int u, v;
        cin >> u >> v;
        tree[u].push_back({v, i + 1});
        tree[v].push_back({u, i + 1});
    }
    k.resize(n);
    for(int i = 0; i < m; i ++){
        int u, v;
        cin >> u >> v;
        k[u].push_back(v);
    }
    if(n <= 2000 and m <= 2000 and q <= 2000){
        degree.resize(n + 1);
        p.resize(n + 1);
        dfs(1);
        while(q --){
            int s, t, x, y;
            cin >> s >> t >> x >> y;
            dfs(s, t);
            sort(all(c));
            for(int j = 0; j < c.size(); j ++){
                if(c[j] <= y)
                    y -= c[j];
                else{
                    x -= c.size() - j;
                    break;
                }
            }
            if(x >= 0)
                cout << x;
            else
                cout << -1;
            cout << endl;
            c.clear();
        }
    }
    else{

    }
}

signed main()
{
    fastio int t = 1;
    // cin >> t;
    while (t--)
    {
        solve();
        cout << endl;
    }
}

Compilation message (stderr)

currencies.cpp:2: warning: ignoring '#pragma gcc optimize' [-Wunknown-pragmas]
    2 | #pragma gcc optimize("Ofast")
      | 
currencies.cpp:3: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    3 | #pragma GCC optimization("Ofast")
      | 
currencies.cpp:4: warning: ignoring '#pragma optimize ' [-Wunknown-pragmas]
    4 | #pragma optimize(Ofast)
      | 
currencies.cpp: In function 'void solve()':
currencies.cpp:85:30: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   85 |             for(int j = 0; j < c.size(); j ++){
      |                            ~~^~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 0 / 28
• Subtask 3: 0 / 30
• Subtask 4: 0 / 32