oj.uz

Submission #667326

# Submission time Handle Problem Language Result Execution time Memory
667326 2022-12-01T06:38:56 Z radal Fireworks (APIO16_fireworks) C++17
19 / 100
 23 ms 1076 KB 
#include <bits/stdc++.h>
#pragma GCC target("sse,sse2,avx2")
#pragma GCC optimize("unroll-loops,O2")
#define rep(i,l,r) for (int i = l; i < r; i++)
#define repr(i,r,l) for (int i = r; i >= l; i--)
#define X first
#define Y second
#define all(x) (x).begin() , (x).end()
#define pb push_back
#define endl '\n'
#define debug(x) cerr << #x << " : " << x << endl;
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int,int> pll;
constexpr int N = 3e2+15,mod = 1e9+7;
constexpr ll inf = 1e18+10;
inline int mkay(int a,int b){
    if (a+b >= mod) return a+b-mod;
   // if (a+b < 0) return a+b+mod;
    return a+b;
}
 
inline int poww(int a,int k){
    if (k < 0) return 0;
    int z = 1;
    while (k){
        if (k&1) z = 1ll*z*a%mod;
        a = 1ll*a*a%mod;
        k >>= 1;
    } 
    return z; 
}
 
vector<pll> adj[N];
ll h[N],val[N][2];
int n,m;
ll dp[N][N];
 
void pre(int v){
	if (v > n) val[v][0] = val[v][1] = h[v];
	else{
		val[v][1] = -inf;
		val[v][0] = inf;
	}
	for (pll p : adj[v]){
		int u = p.X;
		h[u] = h[v]+p.Y;
		pre(u);
		val[v][1] = max(val[v][1],val[u][1]);
		val[v][0] = min(val[v][0],val[u][0]);
	}
}
 
void dfs(int v){
	for (auto [u,w] : adj[v]) dfs(u);
	rep(i,0,N){
		if (v > n && i){
			dp[v][i] = inf;
			continue;
		}
		dp[v][i] = 0;
		for (auto [u,w] : adj[v]){
			if (val[u][0] == inf) continue;
			ll mi = inf;
			rep(j,0,i+1){
				ll cost;
				if (j+w <= i) cost = i-j-w;
				else cost = j+w-i;
				mi = min(mi,dp[u][j]+cost);
			}
			dp[v][i] += mi;
		}
	}
}
 
int main(){
	ios :: sync_with_stdio(0); cin.tie(0);
	cin >> n >> m;
	rep(i,2,n+m+1){
		int p,w;
		cin >> p >> w;
		adj[p].pb({i,w});
	}
	pre(1);
	ll out = inf;
	dfs(1);
	rep(i,0,N) out = min(out,dp[1][i]);
	cout << out;
}

Subtask #1
0 / 7.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 340 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 3 ms 340 KB Output is correct
3 Correct 4 ms 468 KB Output is correct
4 Correct 6 ms 468 KB Output is correct
5 Correct 8 ms 628 KB Output is correct
6 Correct 9 ms 596 KB Output is correct
7 Correct 14 ms 724 KB Output is correct
8 Correct 13 ms 724 KB Output is correct
9 Correct 13 ms 724 KB Output is correct
10 Correct 14 ms 788 KB Output is correct
11 Correct 16 ms 896 KB Output is correct
12 Correct 16 ms 988 KB Output is correct
13 Correct 19 ms 980 KB Output is correct
14 Correct 21 ms 980 KB Output is correct
15 Correct 23 ms 1076 KB Output is correct
16 Correct 22 ms 1060 KB Output is correct
17 Correct 23 ms 1068 KB Output is correct
18 Correct 21 ms 972 KB Output is correct
19 Correct 19 ms 1040 KB Output is correct

Subtask #3
0 / 29.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 340 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 45.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 340 KB Output isn't correct
2 Halted 0 ms 0 KB -