Submission #557866

#	Time	Username	Problem	Language	Result	Execution time	Memory
557866		hhhhaura	Fireworks (APIO16_fireworks)	C++14	19 / 100	1 ms	340 KiB

fireworks

#define wiwihorz
#include <bits/stdc++.h>
#pragma GCC optimize("Ofast")
#pragma GCC target("sse")
#pragma loop-opt(on)
#define rep(i, a, b) for(int i = a; i <= b; i ++)
#define rrep(i, a, b) for(int i = b; i >= a; i --)
#define all(x) x.begin(), x.end()
#define ceil(a, b) ((a + b - 1) / (b))
#define lld long double
#define pii pair<int, int>
#define random mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count())
#define INF 1000000000000000000
#define MOD 1000000007
#define eps (1e-9)
using namespace std;
#ifdef wiwihorz
#define print(a...)cerr<<"Line "<<__LINE__<<":",kout("["+string(#a)+"] = ", a)
void vprint(auto L,auto R){while(L<R)cerr<<*L<<" \n"[next(L) == R], ++L; }
void kout() { cerr << endl; }
template<class T1,class ... T2>void kout(T1 a,T2 ... e){cerr<<a<<" ",kout(e...);}
#else
#define print(...) 0
#define vprint(...) 0
#endif
#define x first
#define y second
namespace solver {
	int n, m;
	vector<vector<pii>> mp;
	vector<multiset<int>> s;
	vector<int> cnt;
	void init_(int _n, int _m) {
		n = _n, m = _m;
		mp.assign(n + m + 1, vector<pii>());
		s.assign(n + m + 1, multiset<int>());
		cnt.assign(n + m + 1, 0);
	}
	void dfs(int x, int cost) {
		for(auto i : mp[x]) {
			dfs(i.x, i.y);
			if(s[i.x].size() > s[x].size())
				s[x].swap(s[i.x]);
			cnt[x] += cnt[i.x];
			for(auto j : s[i.x]) {
				s[x].insert(j);
			}
			s[i.x].clear();
		}
		if(cost != -1) {
			if(x > n) {
				cnt[x] = 1;
				s[x].insert(0);
				s[x].insert(0);
			}
			while(cnt[x] > 1) {
				cnt[x] --;
				s[x].erase(prev(s[x].end()));
			}
			int L = *next(s[x].rbegin());
			int R = *s[x].rbegin();
			s[x].erase(prev(s[x].end()));
			s[x].erase(prev(s[x].end()));
			s[x].insert(L + cost);
			s[x].insert(R + cost);
		}
	}
}
using namespace solver;
signed main() {
	ios::sync_with_stdio(false), cin.tie(0);
	int n, m;
	cin >> n >> m;
	init_(n, m);
	int sum = 0;
	rep(i, 2, n + m) {
		int p, c;
		cin >> p >> c;
		sum += c;
		mp[p].push_back({i, c});
	}
	dfs(1, -1);
	int cur = cnt[1] - s[1].size(), pos = 0;
	auto it = s[1].begin();
	while(cur < 0) {
		sum += cur * (*it - pos);
		cur ++, pos = *it;
		it = next(it);
	}
	cout << sum << "\n";
	return 0;
}

Compilation message (stderr)

fireworks.cpp:5: warning: ignoring '#pragma loop ' [-Wunknown-pragmas]
    5 | #pragma loop-opt(on)
      | 
fireworks.cpp:19:13: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   19 | void vprint(auto L,auto R){while(L<R)cerr<<*L<<" \n"[next(L) == R], ++L; }
      |             ^~~~
fireworks.cpp:19:20: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   19 | void vprint(auto L,auto R){while(L<R)cerr<<*L<<" \n"[next(L) == R], ++L; }
      |                    ^~~~

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