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답안 #722245

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
722245 2023-04-11T15:45:16 Z 600Mihnea Worst Reporter 4 (JOI21_worst_reporter4) C++17
14 / 100
 2000 ms 27636 KB 
#include <cmath>
#include <functional>
#include <fstream>
#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <set>
#include <map>
#include <list>
#include <time.h>
#include <math.h>
#include <random>
#include <deque>
#include <cassert>
#include <queue>
#include <unordered_map>
#include <unordered_set>
#include <iomanip>
#include <bitset>
#include <sstream>
#include <stack>
#include <chrono>
#include <cstring>
#include <numeric>
using namespace std;
typedef long long ll;
const int N = 200000 + 7;
const ll INF = (ll)1e18 + 7;
int n;
int par[N];
int h[N];
int c[N];
vector<int> g[N];
int dep[N];
ll dp[N];
ll dp2[N];
void compute(int a) {
	ll init = min(dp[a], dp2[a]);
	dp[a] = 0;
	for (auto& b : g[a]) {
		dp[a] += min(dp[b], dp2[b]);
	}
	dp2[a] = dp[a] + c[a];
	while (par[a]) {
		ll estim = dp2[par[a]] - init + min(dp[a], dp2[a]);
		init = min(dp[par[a]], dp2[par[a]]);
		dp2[par[a]] = estim;
		a = par[a];
	}
}
void build1(int a) {
	for (auto& b : g[a]) {
		dep[b] = 1 + dep[a];
		build1(b);
	}	
	dp2[a] = c[a];
	for (auto& b : g[a]) {
		dp2[a] += min(dp[b], dp2[b]);
	}
}
signed main() {
#ifdef ONPC	
	FILE* stream;
	freopen_s(&stream, "input.txt", "r", stdin);
#else
	ios::sync_with_stdio(false);
	cin.tie(0); cout.tie(0);
#endif
	cin >> n;
	for (int i = 1; i <= n; i++) {
		cin >> par[i] >> h[i] >> c[i];
		dp[i] = INF;
	}
	assert(par[1] == 1);
	par[1] = 0;
	for (int i = 2; i <= n; i++) {
		assert(1 <= par[i] && par[i] <= i - 1);
		g[par[i]].push_back(i);
	}
	build1(1);
	vector<int> ord(n);
	iota(ord.begin(), ord.end(), 1);
	sort(ord.begin(), ord.end(), [&](int a, int b) {
		if (h[a] != h[b]) {
			return h[a] > h[b];
		}
		return dep[a] > dep[b];
		});
	for (auto& a : ord) {
		compute(a);
	}
	cout << min(dp[1], dp2[1]) << "\n";
	return 0;
}

Subtask #1
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 4 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 7 ms 5204 KB Output is correct
6 Correct 5 ms 5204 KB Output is correct
7 Correct 7 ms 5224 KB Output is correct
8 Correct 8 ms 5204 KB Output is correct
9 Correct 6 ms 5204 KB Output is correct
10 Correct 5 ms 5204 KB Output is correct
11 Correct 6 ms 5204 KB Output is correct
12 Correct 47 ms 5588 KB Output is correct
13 Correct 44 ms 5588 KB Output is correct
14 Correct 24 ms 5508 KB Output is correct
15 Correct 25 ms 5460 KB Output is correct
16 Correct 5 ms 5204 KB Output is correct
17 Correct 5 ms 5308 KB Output is correct
18 Correct 4 ms 5228 KB Output is correct
19 Correct 23 ms 5332 KB Output is correct
20 Correct 24 ms 5420 KB Output is correct
21 Correct 26 ms 5420 KB Output is correct
22 Correct 5 ms 5204 KB Output is correct
23 Correct 4 ms 5204 KB Output is correct
24 Correct 35 ms 5428 KB Output is correct
25 Correct 37 ms 5332 KB Output is correct
26 Correct 45 ms 5588 KB Output is correct
27 Correct 16 ms 5404 KB Output is correct
28 Correct 26 ms 5460 KB Output is correct
29 Correct 39 ms 5460 KB Output is correct
30 Correct 25 ms 5460 KB Output is correct
31 Correct 24 ms 5460 KB Output is correct

Subtask #2
0 / 65.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 4 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 7 ms 5204 KB Output is correct
6 Correct 5 ms 5204 KB Output is correct
7 Correct 7 ms 5224 KB Output is correct
8 Correct 8 ms 5204 KB Output is correct
9 Correct 6 ms 5204 KB Output is correct
10 Correct 5 ms 5204 KB Output is correct
11 Correct 6 ms 5204 KB Output is correct
12 Correct 47 ms 5588 KB Output is correct
13 Correct 44 ms 5588 KB Output is correct
14 Correct 24 ms 5508 KB Output is correct
15 Correct 25 ms 5460 KB Output is correct
16 Correct 5 ms 5204 KB Output is correct
17 Correct 5 ms 5308 KB Output is correct
18 Correct 4 ms 5228 KB Output is correct
19 Correct 23 ms 5332 KB Output is correct
20 Correct 24 ms 5420 KB Output is correct
21 Correct 26 ms 5420 KB Output is correct
22 Correct 5 ms 5204 KB Output is correct
23 Correct 4 ms 5204 KB Output is correct
24 Correct 35 ms 5428 KB Output is correct
25 Correct 37 ms 5332 KB Output is correct
26 Correct 45 ms 5588 KB Output is correct
27 Correct 16 ms 5404 KB Output is correct
28 Correct 26 ms 5460 KB Output is correct
29 Correct 39 ms 5460 KB Output is correct
30 Correct 25 ms 5460 KB Output is correct
31 Correct 24 ms 5460 KB Output is correct
32 Correct 5 ms 5204 KB Output is correct
33 Correct 159 ms 15232 KB Output is correct
34 Correct 161 ms 15276 KB Output is correct
35 Correct 163 ms 15216 KB Output is correct
36 Correct 159 ms 15172 KB Output is correct
37 Correct 153 ms 15308 KB Output is correct
38 Correct 143 ms 15188 KB Output is correct
39 Execution timed out 2074 ms 27636 KB Time limit exceeded
40 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Correct 4 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 3 ms 4948 KB Output is correct
5 Correct 7 ms 5204 KB Output is correct
6 Correct 5 ms 5204 KB Output is correct
7 Correct 7 ms 5224 KB Output is correct
8 Correct 8 ms 5204 KB Output is correct
9 Correct 6 ms 5204 KB Output is correct
10 Correct 5 ms 5204 KB Output is correct
11 Correct 6 ms 5204 KB Output is correct
12 Correct 47 ms 5588 KB Output is correct
13 Correct 44 ms 5588 KB Output is correct
14 Correct 24 ms 5508 KB Output is correct
15 Correct 25 ms 5460 KB Output is correct
16 Correct 5 ms 5204 KB Output is correct
17 Correct 5 ms 5308 KB Output is correct
18 Correct 4 ms 5228 KB Output is correct
19 Correct 23 ms 5332 KB Output is correct
20 Correct 24 ms 5420 KB Output is correct
21 Correct 26 ms 5420 KB Output is correct
22 Correct 5 ms 5204 KB Output is correct
23 Correct 4 ms 5204 KB Output is correct
24 Correct 35 ms 5428 KB Output is correct
25 Correct 37 ms 5332 KB Output is correct
26 Correct 45 ms 5588 KB Output is correct
27 Correct 16 ms 5404 KB Output is correct
28 Correct 26 ms 5460 KB Output is correct
29 Correct 39 ms 5460 KB Output is correct
30 Correct 25 ms 5460 KB Output is correct
31 Correct 24 ms 5460 KB Output is correct
32 Correct 5 ms 5204 KB Output is correct
33 Correct 159 ms 15232 KB Output is correct
34 Correct 161 ms 15276 KB Output is correct
35 Correct 163 ms 15216 KB Output is correct
36 Correct 159 ms 15172 KB Output is correct
37 Correct 153 ms 15308 KB Output is correct
38 Correct 143 ms 15188 KB Output is correct
39 Execution timed out 2074 ms 27636 KB Time limit exceeded
40 Halted 0 ms 0 KB -