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Submission #652852

# Submission time Handle Problem Language Result Execution time Memory
652852 2022-10-24T22:14:16 Z lovrot Fireworks (APIO16_fireworks) C++17
100 / 100
 255 ms 95672 KB 
#include <bits/stdc++.h>

#define X first
#define Y second
#define pb push_back 

using namespace std;

typedef pair<int, int> pii;
typedef long long ll;

struct func{
	ll a;
	ll b;
	int ind;
};

const int N = 300010;

int n, m, siz[N];
ll edge[N];

vector<int> g[N];
priority_queue<ll> slope[N];

func merge(func a, func b){
	func ret;
	ret.a = a.a + b.a;
	ret.b = a.b + b.b;	
	ret.ind = a.ind;
	
	while(!slope[b.ind].empty()){ 
		slope[a.ind].push(slope[b.ind].top()); 
		slope[b.ind].pop();
	}
	return ret;
}

func f(int u){
	func ret;
	if(g[u].empty()){
		ret.a = 1;
		ret.b = -edge[u];
		ret.ind = u;
		slope[u].push(edge[u]);
		slope[u].push(edge[u]);
		return ret;
	} 
	ret = f(g[u][0]);
	int ind = ret.ind;
	for(int i = 1; i < g[u].size(); i++){
		ret = merge(ret, f(g[u][i]));
	}
	while(ret.a > 1){
		ll val = slope[ind].top();
		slope[ind].pop();
		ret.a--;
		ret.b += val;
	}
	ll val = slope[ind].top() + edge[u];
	slope[ind].pop(); 
	ll val2 = slope[ind].top() + edge[u];
	slope[ind].pop(); 
	slope[ind].push(val);
	slope[ind].push(val2);
	ret.b -= edge[u];
	return ret;
}

int dfs(int u){
	int ret = 1;
	for(int v : g[u]){
		ret += dfs(v);
	}
	siz[u] = ret;
	return ret;
}

int main(){
	scanf("%d%d\n", &n, &m);
	
	for(int i = 2; i <= n + m; i++){
		int par;
		ll val;
		scanf("%d%lld", &par, &val);
		g[par].pb(i);
		edge[i] = val;
	}
	
	dfs(1);
	
	for(int i = 1; i <= n; i++){
		sort(g[i].begin(), g[i].end(), [](int a, int b) -> bool {return (siz[a] > siz[b]) || (siz[a] == siz[b] && a < b);});	
	}
	
	func res = f(1);
	ll ans = slope[res.ind].top() + res.b;
	printf("%lld\n", ans);
	return 0;
}

Compilation message

fireworks.cpp: In function 'func f(int)':
fireworks.cpp:51:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |  for(int i = 1; i < g[u].size(); i++){
      |                 ~~^~~~~~~~~~~~~
fireworks.cpp: In function 'int main()':
fireworks.cpp:80:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   80 |  scanf("%d%d\n", &n, &m);
      |  ~~~~~^~~~~~~~~~~~~~~~~~
fireworks.cpp:85:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   85 |   scanf("%d%lld", &par, &val);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 16724 KB Output is correct
2 Correct 9 ms 16700 KB Output is correct
3 Correct 9 ms 16744 KB Output is correct
4 Correct 9 ms 16760 KB Output is correct
5 Correct 9 ms 16748 KB Output is correct
6 Correct 9 ms 16640 KB Output is correct
7 Correct 9 ms 16744 KB Output is correct
8 Correct 9 ms 16724 KB Output is correct
9 Correct 9 ms 16724 KB Output is correct
10 Correct 10 ms 16676 KB Output is correct

Subtask #2
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 16724 KB Output is correct
2 Correct 8 ms 16724 KB Output is correct
3 Correct 8 ms 16724 KB Output is correct
4 Correct 9 ms 16720 KB Output is correct
5 Correct 9 ms 16724 KB Output is correct
6 Correct 9 ms 16724 KB Output is correct
7 Correct 9 ms 16680 KB Output is correct
8 Correct 9 ms 16724 KB Output is correct
9 Correct 9 ms 16724 KB Output is correct
10 Correct 9 ms 16724 KB Output is correct
11 Correct 9 ms 16724 KB Output is correct
12 Correct 9 ms 16724 KB Output is correct
13 Correct 9 ms 16736 KB Output is correct
14 Correct 9 ms 16812 KB Output is correct
15 Correct 10 ms 16768 KB Output is correct
16 Correct 9 ms 16724 KB Output is correct
17 Correct 9 ms 16724 KB Output is correct
18 Correct 9 ms 16724 KB Output is correct
19 Correct 9 ms 16724 KB Output is correct

Subtask #3
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 16724 KB Output is correct
2 Correct 9 ms 16700 KB Output is correct
3 Correct 9 ms 16744 KB Output is correct
4 Correct 9 ms 16760 KB Output is correct
5 Correct 9 ms 16748 KB Output is correct
6 Correct 9 ms 16640 KB Output is correct
7 Correct 9 ms 16744 KB Output is correct
8 Correct 9 ms 16724 KB Output is correct
9 Correct 9 ms 16724 KB Output is correct
10 Correct 10 ms 16676 KB Output is correct
11 Correct 9 ms 16724 KB Output is correct
12 Correct 8 ms 16724 KB Output is correct
13 Correct 8 ms 16724 KB Output is correct
14 Correct 9 ms 16720 KB Output is correct
15 Correct 9 ms 16724 KB Output is correct
16 Correct 9 ms 16724 KB Output is correct
17 Correct 9 ms 16680 KB Output is correct
18 Correct 9 ms 16724 KB Output is correct
19 Correct 9 ms 16724 KB Output is correct
20 Correct 9 ms 16724 KB Output is correct
21 Correct 9 ms 16724 KB Output is correct
22 Correct 9 ms 16724 KB Output is correct
23 Correct 9 ms 16736 KB Output is correct
24 Correct 9 ms 16812 KB Output is correct
25 Correct 10 ms 16768 KB Output is correct
26 Correct 9 ms 16724 KB Output is correct
27 Correct 9 ms 16724 KB Output is correct
28 Correct 9 ms 16724 KB Output is correct
29 Correct 9 ms 16724 KB Output is correct
30 Correct 9 ms 16724 KB Output is correct
31 Correct 9 ms 16764 KB Output is correct
32 Correct 10 ms 16756 KB Output is correct
33 Correct 11 ms 16852 KB Output is correct
34 Correct 10 ms 16888 KB Output is correct
35 Correct 12 ms 16932 KB Output is correct
36 Correct 11 ms 17036 KB Output is correct
37 Correct 11 ms 16980 KB Output is correct
38 Correct 11 ms 17008 KB Output is correct
39 Correct 13 ms 17044 KB Output is correct
40 Correct 11 ms 18040 KB Output is correct
41 Correct 10 ms 18036 KB Output is correct
42 Correct 11 ms 16960 KB Output is correct
43 Correct 12 ms 17492 KB Output is correct
44 Correct 11 ms 17364 KB Output is correct
45 Correct 11 ms 17400 KB Output is correct
46 Correct 11 ms 17108 KB Output is correct
47 Correct 13 ms 17108 KB Output is correct
48 Correct 12 ms 17020 KB Output is correct
49 Correct 12 ms 17108 KB Output is correct
50 Correct 11 ms 17068 KB Output is correct
51 Correct 11 ms 16980 KB Output is correct
52 Correct 11 ms 17072 KB Output is correct
53 Correct 11 ms 17144 KB Output is correct
54 Correct 12 ms 17140 KB Output is correct

Subtask #4
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 16724 KB Output is correct
2 Correct 9 ms 16700 KB Output is correct
3 Correct 9 ms 16744 KB Output is correct
4 Correct 9 ms 16760 KB Output is correct
5 Correct 9 ms 16748 KB Output is correct
6 Correct 9 ms 16640 KB Output is correct
7 Correct 9 ms 16744 KB Output is correct
8 Correct 9 ms 16724 KB Output is correct
9 Correct 9 ms 16724 KB Output is correct
10 Correct 10 ms 16676 KB Output is correct
11 Correct 9 ms 16724 KB Output is correct
12 Correct 8 ms 16724 KB Output is correct
13 Correct 8 ms 16724 KB Output is correct
14 Correct 9 ms 16720 KB Output is correct
15 Correct 9 ms 16724 KB Output is correct
16 Correct 9 ms 16724 KB Output is correct
17 Correct 9 ms 16680 KB Output is correct
18 Correct 9 ms 16724 KB Output is correct
19 Correct 9 ms 16724 KB Output is correct
20 Correct 9 ms 16724 KB Output is correct
21 Correct 9 ms 16724 KB Output is correct
22 Correct 9 ms 16724 KB Output is correct
23 Correct 9 ms 16736 KB Output is correct
24 Correct 9 ms 16812 KB Output is correct
25 Correct 10 ms 16768 KB Output is correct
26 Correct 9 ms 16724 KB Output is correct
27 Correct 9 ms 16724 KB Output is correct
28 Correct 9 ms 16724 KB Output is correct
29 Correct 9 ms 16724 KB Output is correct
30 Correct 9 ms 16724 KB Output is correct
31 Correct 9 ms 16764 KB Output is correct
32 Correct 10 ms 16756 KB Output is correct
33 Correct 11 ms 16852 KB Output is correct
34 Correct 10 ms 16888 KB Output is correct
35 Correct 12 ms 16932 KB Output is correct
36 Correct 11 ms 17036 KB Output is correct
37 Correct 11 ms 16980 KB Output is correct
38 Correct 11 ms 17008 KB Output is correct
39 Correct 13 ms 17044 KB Output is correct
40 Correct 11 ms 18040 KB Output is correct
41 Correct 10 ms 18036 KB Output is correct
42 Correct 11 ms 16960 KB Output is correct
43 Correct 12 ms 17492 KB Output is correct
44 Correct 11 ms 17364 KB Output is correct
45 Correct 11 ms 17400 KB Output is correct
46 Correct 11 ms 17108 KB Output is correct
47 Correct 13 ms 17108 KB Output is correct
48 Correct 12 ms 17020 KB Output is correct
49 Correct 12 ms 17108 KB Output is correct
50 Correct 11 ms 17068 KB Output is correct
51 Correct 11 ms 16980 KB Output is correct
52 Correct 11 ms 17072 KB Output is correct
53 Correct 11 ms 17144 KB Output is correct
54 Correct 12 ms 17140 KB Output is correct
55 Correct 17 ms 17652 KB Output is correct
56 Correct 41 ms 20428 KB Output is correct
57 Correct 63 ms 22984 KB Output is correct
58 Correct 102 ms 24720 KB Output is correct
59 Correct 125 ms 27344 KB Output is correct
60 Correct 149 ms 30080 KB Output is correct
61 Correct 170 ms 32188 KB Output is correct
62 Correct 201 ms 33732 KB Output is correct
63 Correct 232 ms 36800 KB Output is correct
64 Correct 255 ms 37752 KB Output is correct
65 Correct 131 ms 95560 KB Output is correct
66 Correct 133 ms 95672 KB Output is correct
67 Correct 129 ms 34632 KB Output is correct
68 Correct 171 ms 66396 KB Output is correct
69 Correct 217 ms 61236 KB Output is correct
70 Correct 211 ms 61164 KB Output is correct
71 Correct 185 ms 46736 KB Output is correct
72 Correct 175 ms 46772 KB Output is correct
73 Correct 155 ms 43412 KB Output is correct
74 Correct 152 ms 43544 KB Output is correct
75 Correct 161 ms 42424 KB Output is correct
76 Correct 160 ms 42492 KB Output is correct
77 Correct 162 ms 41992 KB Output is correct
78 Correct 161 ms 40204 KB Output is correct
79 Correct 147 ms 41268 KB Output is correct