Submission #1051617

#	Time	Username	Problem	Language	Result	Execution time	Memory
1051617		MrAndria	Magic Tree (CEOI19_magictree)	C++14	34 / 100	1175 ms	1048576 KiB

magictree

#include <bits/stdc++.h>
using namespace std;
#define ff first
#define ss second
#define pb push_back
// #define int long long
int n,m,k,d,w,v1,sum[100005],day[100005],x;
long long ans;
map <int,long long> dp[100005];
vector <map <int,long long> :: iterator> v;
vector <int> adj[100005];

void dfs(int x,int p){
    for(auto u:adj[x]){
        if(u!=p){
            dfs(u,x);
            if(dp[u].size()<dp[x].size()){
                swap(dp[u],dp[x]);
            }
            for(auto l:dp[u]){
                dp[x][l.ff]+=l.ss;
            }
        }
    }
    k=sum[x];
    v.clear();

    auto it=dp[x].upper_bound(day[x]);
    while(true){
        if(it==dp[x].end())break;
        if((*it).ss>k){
            (*it).ss-=k;
            break;
        }
        k-=(*it).ss;
        v.pb(it);
        it++;
    }
    for(int i=0;i<v.size();i++){
        dp[x].erase(v[i]);
    }
    dp[x][day[x]]+=sum[x];
    
}
signed main(){
    cin>>n>>m>>k;
    for(int i=1;i<=n-1;i++){
        cin>>x;
        adj[i+1].pb(x);
        adj[x].pb(i+1);
    }
    for(int i=1;i<=m;i++){
        cin>>v1>>d>>w;
        day[v1]=d;
        sum[v1]=w;
    }
    dfs(1,0);
    for(auto u:dp[1]){
        ans+=u.ss;
    }
    cout<<ans<<endl;
}

Compilation message (stderr)

magictree.cpp: In function 'void dfs(int, int)':
magictree.cpp:39:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::_Rb_tree_iterator<std::pair<const int, long long int> > >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |     for(int i=0;i<v.size();i++){
      |                 ~^~~~~~~~~

• Subtask 1: 6 / 6
• Subtask 2: 0 / 3
• Subtask 3: 0 / 11
• Subtask 4: 12 / 12
• Subtask 5: 16 / 16
• Subtask 6: 0 / 13
• Subtask 7: 0 / 22
• Subtask 8: 0 / 17