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Submission #554286

# Submission time Handle Problem Language Result Execution time Memory
554286 2022-04-28T06:31:31 Z Keshi Fireworks (APIO16_fireworks) C++17
0 / 100
 1 ms 724 KB 
//In the name of God
#include <bits/stdc++.h>
using namespace std;

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

const int maxn = 1024;
const ll mod = 1e9 + 7;
const ll inf = 1e15;

#define fast_io ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define file_io freopen("input.txt", "r+", stdin);freopen("output.txt", "w+", stdout);
#define pb push_back
#define Mp make_pair
#define F first
#define S second
#define Sz(x) ll((x).size())
#define all(x) (x).begin(), (x).end()

ll pw(ll a, ll b){
	ll c = 1;
	while(b){
		if(b & 1) c = c * a % mod;
		a = a * a % mod;
		b >>= 1;
	}
	return c;
}

int n, m, p[maxn], c[maxn];
vector<int> g[maxn];
ll dp[maxn][maxn];

void dfs(int v){
	for(int u : g[v]){
		dfs(u);
		for(int i = c[v]; i < maxn; i++){
			dp[v][i] += dp[u][i - c[v]];
		}
	}
	if(g[v].empty()){
		fill(dp[v], dp[v] + maxn, inf);
		dp[v][c[v]] = 0;
	}
	for(int i = 0; i < c[v]; i++){
		dp[v][i] = inf;
	}
	ll mn = inf;
	for(int i = 0; i < maxn; i++){
		dp[v][i] = min(dp[v][i], i + mn);
		mn = min(mn, dp[v][i] - i);
	}
	mn = inf;
	for(int i = maxn; i--;){
		dp[v][i] = min(dp[v][i], mn - i);
		mn = min(mn, dp[v][i] + i);
	}
	return;
}

int main(){
	fast_io;

	cin >> n >> m;
	for(int i = 2; i <= n + m; i++){
		cin >> p[i] >> c[i];
		g[p[i]].pb(i);
	}
	dfs(1);
	ll ans = inf;
	for(int i = 0; i < maxn; i++){
		ans = min(ans, dp[1][i]);
	}
	cout << ans << "\n";
	
	return 0;
}

Subtask #1
0 / 7.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 468 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #2
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 596 KB Output is correct
3 Incorrect 1 ms 724 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 29.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 468 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #4
0 / 45.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 468 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -