Submission #1275424

#	Time	Username	Problem	Language	Result	Execution time	Memory
1275424		SmuggingSpun	Birokracija (COCI18_birokracija)	C++20	100 / 100	49 ms	24928 KiB

birokracija

#include<bits/stdc++.h>
#define taskname "C"
using namespace std;
typedef long long ll;
const int lim = 2e5 + 5;
int n, cnt[lim];
ll ans[lim];
vector<int>g[lim];
void dfs(int s){
	cnt[s] = ans[s] = 1;
	for(int& d : g[s]){
		dfs(d);
		cnt[s] += cnt[d];
		ans[s] += ans[d];
	}
	ans[s] += cnt[s] - 1;
}
int main(){
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	if(fopen(taskname".inp", "r")){
		freopen(taskname".inp", "r", stdin);
	}
	cin >> n;
	for(int i = 2; i <= n; i++){
		int x;
		cin >> x;
		g[x].push_back(i);
	}
	dfs(1);
	for(int i = 1; i <= n; i++){
		cout << ans[i] << " ";
	}
}

Compilation message (stderr)

birokracija.cpp: In function 'int main()':
birokracija.cpp:21:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |                 freopen(taskname".inp", "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10