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Submission #577695

# Submission time Handle Problem Language Result Execution time Memory
577695 2022-06-15T08:10:21 Z GioChkhaidze Poklon (COCI17_poklon7) C++14
120 / 120
 288 ms 122724 KB 
// Source: https://usaco.guide/general/io

#include <bits/stdc++.h>
#define f first
#define s second
using namespace std;

const int N = 3e6 + 6;

int n, lf[N], rf[N], c[N];

pair < int , pair < int , int > > dfs(int x) {
	if (x > n) {
		int sz = (int)log2(c[x]) + 1;
		return {c[x], {sz, sz}};
	}
	pair < int ,  pair < int , int > > Lf = dfs(lf[x]);
	pair < int ,  pair < int , int > > Rf = dfs(rf[x]);
	++Lf.s.f, ++Rf.s.f;
	if (Lf.s.f > Rf.s.f) return Lf;
	if (Lf.s.f < Rf.s.f) return Rf;
	if (Lf.s.s < Rf.s.s) {
		if (Lf.f * (1 << (Rf.s.s - Lf.s.s)) > Rf.f) 
			return Lf;
		return Rf;
	}
	if (Lf.s.s > Rf.s.s) {
		if (Rf.f * (1 << (Lf.s.s - Rf.s.s)) > Lf.f) 
			return Rf;
		return Lf;
	}
	if (Lf.f > Rf.f) return Lf;
	return Rf;
}

int main() {
	ios::sync_with_stdio(false);
	cin.tie(NULL), cout.tie(NULL);
	cin >> n;
	int ts = n;
	for (int i = 1; i <= n; ++i) {
		cin >> lf[i] >> rf[i];
		if (lf[i] < 0) {
			++ts;
			c[ts] = -lf[i];
			lf[i] = ts;
		}
		if (rf[i] < 0) {
			++ts;
			c[ts] = -rf[i];
			rf[i] = ts;
		}
	}
	pair < int ,  pair < int , int > > ans = dfs(1);
	for (int i = ans.s.s - 1; i >= 0; --i) {
		cout << ((ans.f >> i) & 1);
	}
	for (int i = 0; i < ans.s.f - ans.s.s; ++i) {
		cout << 0;
	} 
}

Subtask #1
120.0 / 120.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 1 ms 328 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 4 ms 852 KB Output is correct
12 Correct 4 ms 852 KB Output is correct
13 Correct 15 ms 3604 KB Output is correct
14 Correct 29 ms 7224 KB Output is correct
15 Correct 29 ms 1480 KB Output is correct
16 Correct 88 ms 18144 KB Output is correct
17 Correct 211 ms 37904 KB Output is correct
18 Correct 225 ms 42764 KB Output is correct
19 Correct 245 ms 31468 KB Output is correct
20 Correct 288 ms 122724 KB Output is correct