Submission #47695

#	Time	Username	Problem	Language	Result	Execution time	Memory
47695		square1001	Fireworks (APIO16_fireworks)	C++14	55 / 100	2069 ms	268180 KiB

fireworks

#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;
int N, M, p[300009], c[300009], deg[300009]; vector<long long> v[300009];
int main() {
	cin.tie(0);
	ios_base::sync_with_stdio(false);
	cin >> N >> M;
	long long sum = 0;
	for (int i = 1; i < N + M; i++) {
		cin >> p[i] >> c[i];
		deg[--p[i]]++;
		sum += c[i];
	}
	for (int i = N + M - 1; i >= 0; i--) {
		if (i >= N) {
			v[i].push_back(c[i]);
			v[i].push_back(c[i]);
		}
		else {
			sort(v[i].begin(), v[i].end());
			for (int j = 0; j < deg[i] - 1; j++) v[i].pop_back();
			v[i][v[i].size() - 1] += c[i];
			v[i][v[i].size() - 2] += c[i];
		}
		if (i != 0) {
			v[p[i]].insert(v[p[i]].end(), v[i].begin(), v[i].end());
		}
	}
	for (int i = 0; i < v[0].size(); i++) {
		sum -= (v[0][i] - (i == 0 ? 0 : v[0][i - 1])) * (v[0].size() - i - 1);
	}
	cout << sum << '\n';
	return 0;
}

Compilation message (stderr)

fireworks.cpp: In function 'int main()':
fireworks.cpp:31:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < v[0].size(); i++) {
                  ~~^~~~~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 19 / 19
• Subtask 3: 29 / 29
• Subtask 4: 0 / 45