Submission #628674

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
628674	2022-08-13 15:12:40	qwerasdfzxcl	Thousands Islands (IOI22_islands)	C++17	100 / 100	339 ms	37784 KiB

islands

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#include "islands.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
pair<int, int> E[200200];
set<pair<int, int>> adj[100100], INV[100100];
vector<int> deg0, ansf, ansb;
int n, s, on[100100], visited[100100];
bool flag = 0;
vector<int> operator + (const vector<int> &a, const vector<int> &b){
    vector<int> ret = a;
    for (auto &x:b) ret.push_back(x);
    return ret;
}
vector<int> rev(vector<int> a){reverse(a.begin(), a.end()); return a;}
void pop(int x){
    auto [v, i] = *adj[x].begin();
    adj[x].erase(adj[x].begin());
    INV[v].erase(INV[v].find(make_pair(x, i)));
}
void _erase(int x){
    if (!on[x]) return;
    on[x] = 0;
    for (auto &[v, i]:INV[x]){
        adj[v].erase(adj[v].find(make_pair(x, i)));
 
 
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• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 21 / 21
• Subtask 4: 24 / 24
• Subtask 5: 45 / 45