Submission #1060157

#	Time	Username	Problem	Language	Result	Execution time	Memory
1060157		aymanrs	Nestabilnost (COI23_nestabilnost)	C++17	12 / 100	1515 ms	74744 KiB

code1

#include<bits/stdc++.h>
using namespace std;
vector<int> cost, mic;int N;
struct node {
    vector<long long> dp;
    long long lock=-1,free = -1;
    vector<node*> l;
    int a;
};
// void dfs(node* n, node* p){
//     for(node* c : n->l) if(c!=p) dfs(c,n);
//     n->dp.resize(N+1);
//     n->free = LONG_LONG_MAX;
//     for(int k = n->a+1;k <= N;k++){
//         n->dp[k] = cost[k];
//         for(node* c : n->l){
//             if(c==p) continue;
//             if(!c->a){
//                 if(k == n->a+1) n->dp[k] += min(c->dp[k]-cost[k], c->free);
//                 else n->dp[k] += c->free;
//             } else if(c->a == n->a+1){
//                 if(k>c->a) n->dp[k] += min(c->dp[k]-cost[k], c->free);
//                 else n->dp[k] += c->free;
//             } else n->dp[k] += c->free;
//         }
//         n->free = min(n->free, n->dp[k]);
//     }
// }
long long dfs(node* n, node* p, int l, int r){
    if(l==r && n->lock != -1) return n->lock;
    if(l==1&&r==N&&n->free != -1) return n->free;
    long long ans = 0;
    for(node* c : n->l) if(c!=p) {
        if(!c->a){
            if(r<n->a+1 || n->a+1 < l){
                if(r==N) ans += mic[l]+dfs(c, n, 1, N);
                else ans += cost[l]+dfs(c, n, 1,N);
            } else {
                if(l==r) ans += dfs(c, n, l,r);
                else ans += min(dfs(c, n, n->a+1,n->a+1), mic[l]+dfs(c,n,1,N));
            }
        } else if(c->a == n->a+1){
            if(r <= c->a) ans += cost[r]+dfs(c, n, 1, N);
            else ans += dfs(c, n, max(l,c->a+1),r);
        } else {
            if(l==r) ans += cost[l]+dfs(c,n, 1, N);
            else ans += mic[l]+dfs(c,n,1,N);
        }
    }
    if(!ans) {
        if(l==r) ans = cost[l];
        else ans = mic[l];
    }
    if(l==r) n->lock=ans;
    if(l==1&&r==N&&n->free!=-1) n->free=ans;
    return ans;
}
void solve(){
    int n;cin >> n;
    N=n;
    node g[n+1];
    cost.resize(n+1);
    mic.resize(n+1);
    for(int i = 1;i <= n;i++) cin >> g[i].a;
    for(int i = 1;i <= n;i++) cin >> cost[i];
    for(int i = n;i >= 1;i--){
        mic[i] = cost[i];
        if(i < n) mic[i] = min(mic[i],mic[i+1]);
    }
    for(int i = 0;i < n-1;i++){
        int u,v;cin >> u >> v;
        g[u].l.push_back(&g[v]);
        g[v].l.push_back(&g[u]);
    }
    cout << dfs(&g[1], NULL, 1, N) << '\n';
}
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    solve();
}

• Subtask 1: 12 / 12
• Subtask 2: 0 / 20
• Subtask 3: 0 / 7
• Subtask 4: 0 / 22
• Subtask 5: 0 / 39