Submission #1255841

#	Time	Username	Problem	Language	Result	Execution time	Memory
1255841		M_SH_O	Bridges (APIO19_bridges)	C++20	14 / 100	53 ms	8136 KiB

bridges

#include <bits/stdc++.h>
//#include "rainbow.h"

#define ll long long
#define ll1 long long
#define ull unsigned long long
#define dou long double
#define str string
#define vll vector<ll>
#define vi vector<int>
#define pll pair<ll, ll>
#define vpll vector<pll>
#define vbool vector<bool>
#define vstr vector<str>
#define vvll vector<vll>
#define pb push_back
#define pf push_front
#define endl "\n"
#define fr first
#define se second
// #define sortcmp(a) sort(a.begin(), a.end(), cmp)
#define sort(a) sort(a.begin(), a.end())
#define reverse(a) reverse(a.begin(), a.end())
#define speed ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0)
#define ordered_set tree<ll, null_type, less_equal<ll>, rb_tree_tag, tree_order_statistics_node_update>

using namespace std;
//using namespace __gnu_pbds;

const ll INF = 1e18;
const int lg = 20;

mt19937 rng(time(0));
ll randll(ll l, ll r){
    return uniform_int_distribution<ll>(l, r)(rng);
}

vll p, s;

ll find(ll v){
    if(p[v] == v) return v;
    return p[v] = find(p[v]);
}

void unite(ll a, ll b){
    a = find(a);
    b = find(b);
    
    if(a == b) return;
    if(s[a] < s[b]){
        p[a] = b;
        s[b] += s[a];
    }
    else{
        p[b] = a;
        s[a] += s[b];
    }
}

int main(){
    speed;
    ll n, m;
    cin >> n >> m;
    vector<pair<ll, pll>> v, qu;
    s.resize(n+7, 1);
    p.resize(n+7);
    for(int i = 1; i <= n; i ++){
        p[i] = i;
    }
    for(int i =0 ; i < m; i ++){
        ll a, b, c;
        cin >> a >> b >> c;
        v.pb({c, {a, b}});
    }
    
    ll q;
    cin >> q;
    for(int i = 0; i < q; i ++){
        ll x, a, b;
        cin >> x >> a >> b;
        qu.pb({b, {a, i}});
    }
    
    sort(qu);
    sort(v);
    reverse(v);
    reverse(qu);
    ll l = 0;
    vll res(q, 1);
    for(auto i : v){
        //cout << i.fr << ' ' << i.se.fr << ' ' << i.se.se << endl;
        while(l < q){
            if(qu[l].fr <= i.fr) break;
            //cout << qu[l].se.fr << ' ' << qu[l].fr << endl;
            res[qu[l].se.se] = s[find(qu[l].se.fr)];
            l ++;
        }
        unite(i.se.fr, i.se.se);
    }
    while(l < q){
        res[qu[l].se.se] = s[find(qu[l].se.fr)];
        l ++;
    }
    
    for(int i = 0; i < q; i ++){
        cout << res[i] << endl;
    }
}

• Subtask 1: 0 / 13
• Subtask 2: 0 / 16
• Subtask 3: 0 / 17
• Subtask 4: 14 / 14
• Subtask 5: 0 / 13
• Subtask 6: 0 / 27