Submission #576278

#	Time	Username	Problem	Language	Result	Execution time	Memory
576278		keta_tsimakuridze	Teleporters (IOI08_teleporters)	C++14	100 / 100	908 ms	65536 KiB

teleporters

#include<bits/stdc++.h>
using namespace std;
//#define int long long
#define pii pair<int,int>
#define f first
#define s second
#define endl "\n"
const int N = 2e6 + 5, M = 2e6 + 1, mod = 1e9 + 7; //!
int t;
bool vis[N];
pair<int,bool> to[N];
main() {
//	ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0);
	int n, m;
	cin >> n >> m;
	
	for(int i = 0; i <= M - 1; i++) to[i] = {i + 1, 0};
	for(int i = 1; i <= n; i++) {
		int l, r;
		cin >> l >> r;
		to[l - 1] = {r, 1};
		to[r - 1] = {l, 1};
	}
	multiset<int> s;
	int init = 0;
	for(int i = 0; i <= M; i++) {
		if(!vis[i]) {
			int cn = 0, x = i;
			while(!vis[x]) {
				cn += to[x].s;
				vis[x] = 1;
				x = to[x].f;
			}
			if(!i) init = cn;
			else s.insert(cn);
		}
	}
	while(m--) {
		if(s.size()) init += *--s.end() + 2, s.erase(s.find(*--s.end()));
		else {
			init++;
			s.insert(1);
		}
	}
	cout << init;
}

Compilation message (stderr)

teleporters.cpp:12:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   12 | main() {
      | ^~~~

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 5 / 5
• Subtask 4: 5 / 5
• Subtask 5: 5 / 5
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• Subtask 8: 5 / 5
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• Subtask 19: 5 / 5
• Subtask 20: 5 / 5