Submission #745005

#	Time	Username	Problem	Language	Result	Execution time	Memory
745005		onebit1024	Two Currencies (JOI23_currencies)	C++17	10 / 100	5084 ms	42208 KiB

currencies

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

#define int long long
#define pb push_back
#define all(c) c.begin(), c.end()
#define endl "\n"

const double PI=3.141592653589;


void __print(int x) {cerr << x;}
void __print(long x) {cerr << x;}
void __print(unsigned x) {cerr << x;}
void __print(unsigned long x) {cerr << x;}
void __print(unsigned long long x) {cerr << x;}
void __print(float x) {cerr << x;}
void __print(double x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << '\'' << x << '\'';}
void __print(const char *x) {cerr << '\"' << x << '\"';}
void __print(const string &x) {cerr << '\"' << x << '\"';}
void __print(bool x) {cerr << (x ? "true" : "false");}

template<typename T, typename V>
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? "," : ""), __print(i); cerr << "}";}
void _print() {cerr << "]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
#ifndef ONLINE_JUDGE
#define dbg(x...) cerr << "LINE(" << __LINE__ << ") -> " <<"[" << #x << "] = ["; _print(x)
#else
#define dbg(x...)
#endif


int n,m,q;
vector<vector<int>>adj, up,tax;
vector<int>par,dist;

void comp(int u, int p){
    for(int v : adj[u]){
        if(v==p)continue;
        par[v] = u;
        dist[v] = dist[u]+1;
        up[v][0] = u;
        for(int j = 1;j<=20;++j)up[v][j] = up[up[v][j-1]][j-1];
        comp(v,u);
    }
}

int lca(int u, int v){
    if(dist[v] > dist[u])swap(v,u);
    int k = dist[u]-dist[v];
    for(int j = 0;j<=20;++j){
        if(k&(1ll<<j))u = up[u][j];
    }
    if(u==v)return u;
    for(int j = 20;j>=0;--j){
        if(up[u][j] != up[v][j])u = up[u][j], v = up[v][j];
    }
    return up[v][0];
}
void solve()
{
    cin >> n >> m >> q;
    adj.resize(n+1);
    up = vector<vector<int>>(n+1, vector<int>(21));
    vector<pair<int,int>>edges = {{0,0}};
    dist.resize(n+1);
    tax.resize(n+1);
    par.resize(n+1);
    for(int i = 1;i<n;++i){
        int u,v;
        cin >> u >> v;
        edges.pb({u,v});
        adj[u].pb(v);
        adj[v].pb(u);
    }
    comp(1,-1);
    for(int i = 1;i<=m;++i){
        int p,c;
        cin >> p >> c;
        int u = edges[p].first, v = edges[p].second;
        if(par[u] == v)swap(v,u);
        // par[v] = u
        tax[v].pb(c);
    }
    while(q--){
        int u,v,g,s;
        cin >> u >> v >> g >> s;
        int l = lca(u,v);
        vector<int>res;
        while(u!=l){
            for(auto x : tax[u])res.pb(x);
            u = par[u];
        }
        while(v!=l){
            for(auto x : tax[v])res.pb(x);
            v = par[v];
        }
        sort(all(res));
        bool got = 0;
        for(int i = 0;i<res.size();++i){
            if(s>=res[i])s-=res[i];
            else{
                int need = res.size()-i;
                int val = g-need;
                if(val < 0)val = -1;
                cout << val << endl;
                got = 1;
                break;
            }
        }
        if(!got)cout << g << endl;
    }
}   

int32_t main()
{

    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);


    // freopen("input.txt", "r", stdin);
    // freopen("output.txt", "w", stdout);
    

    int T=1;
    for(int i = 1;i<=T;++i)
    {
        // cout << "Case #" << i << ": ";
        solve();
    }
}

Compilation message (stderr)

currencies.cpp: In function 'void solve()':
currencies.cpp:106:24: 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]
  106 |         for(int i = 0;i<res.size();++i){
      |                       ~^~~~~~~~~~~

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