Submission #1153048

#	Time	Username	Problem	Language	Result	Execution time	Memory
1153048		vladilius	Fireworks (APIO16_fireworks)	C++20	0 / 100	51 ms	836 KiB

fireworks

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
#define pb push_back
#define ff first
#define ss second

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    
    int n, m; cin>>n>>m;
    int f = n + m;
    vector<ll> p(f + 1);
    vector<int> g[f + 1];
    for (int i = 2; i <= f; i++){
        int x, w; cin>>x>>w;
        g[x].pb(i);
        p[i] = p[x] + w;
    }

    const ll A = 1e3;
    
    vector<vector<ll>> t(f + 1, vector<ll>(A + 1));
    for (int i = n + 1; i <= f; i++){
        for (int j = 0; j <= A; j++){
            t[i][j] = abs(j - p[i]);
        }
    }
    
    function<void(int)> fill = [&](int v){
        if (v > n) return;
        for (int i: g[v]){
            fill(i);
        }
        
        for (int x = 0; x <= A; x++){
            for (int i: g[v]){
                ll mn = 1e18;
                for (int a = 0; a <= A; a++){
                    mn = min(mn, t[i][a] + abs(a - x));
                }
                t[v][x] += mn;
            }
        }
    };
    fill(1);
    
    ll out = 1e18;
    for (int x = 0; x <= A; x++){
        out = min(out, t[1][x]);
    }
    cout<<out<<"\n";
}

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