Submission #1127191

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1127191	2024-12-16 19:21:49	HossamHero7	Bridges (APIO19_bridges)	C++20	59 / 100	3093 ms	107744 KiB

bridges

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// In sha2 Allah IOI 2025
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define endl '\n'
struct DSU{
    vector<int> par;
    vector<int> sz;
    vector<pair<int,int>> rsz;
    vector<int> rpar;
    DSU(int n){
        par.resize(n+1) , sz.resize(n+1,1);
        iota(par.begin(),par.end(),0);
    }
    int getP(int node){
        if(node == par[node]) return node;
        return getP(par[node]);
    }
    bool join(int a,int b){
        a = getP(a) , b = getP(b);
        if(a == b) return 0;
        if(sz[a] < sz[b]) swap(a,b);
        rsz.push_back({a,sz[a]});
        rpar.push_back(b);
        par[b] = a;
        sz[a] += sz[b];
        return 1;
    }
    void rollback(){
        sz[rsz.back().first] = rsz.back().second;
 
 
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• Subtask 1: 13 / 13
• Subtask 2: 16 / 16
• Subtask 3: 17 / 17
• Subtask 4: 0 / 14
• Subtask 5: 13 / 13
• Subtask 6: 0 / 27