Submission #1046133

#	Time	Username	Problem	Language	Result	Execution time	Memory
1046133		batsukh2006	Closing Time (IOI23_closing)	C++17	8 / 100	121 ms	43972 KiB

closing

#include "closing.h"
#include<iostream>
#include<map>
#include<set>
#include<cmath>
#include<queue>
#include<deque>
#include<stack>
#include<string>
#include<math.h>
#include<vector>
#include<stdio.h>
#include<utility>
#include<iomanip>
#include<string.h>
#include<limits.h>
#include<algorithm>
#include<functional>
#include<unordered_map> 
using namespace std;
#define ss second
#define ff first
#define endl '\n'
vector<pair<long long,int> > f,s;
vector<vector<pair<int,int> > > g;
void dfs1(int a, int p, long long w){
    f.push_back({w,a});
    for(auto node: g[a]){
        if(node.ff!=p){
            dfs1(node.ff,a,w+node.ss);
        }
    }
}
void dfs2(int a, int p, long long w){
    s.push_back({w,a});
    for(auto node: g[a]){
        if(node.ff!=p){
            dfs2(node.ff,a,w+node.ss);
        }
    }
}
int max_score(int n, int x, int y, long long k, vector<int> u, vector<int> v, vector<int> w){
    f.clear(),s.clear();
    g.clear(),g.resize(n);
    for(int i=0; i<w.size(); i++){
        g[u[i]].push_back({v[i],w[i]});
        g[v[i]].push_back({u[i],w[i]});
    }
    dfs1(x,-1,0);
    dfs2(y,-1,0);
    sort(f.begin(),f.end());
    sort(s.begin(),s.end());
    bool ok=0;
    int ans=0,cur=0;
    long long sum=0;
    vector<long long> vis(n,-1);
    for(auto i: f){
        if(sum+i.ff<=k){
            cur++;
            sum+=i.ff;
            vis[i.ss]=i.ff;
            if(i.ss==y) ok=1;
            int cnt=cur;
            long long tmp=sum;
            for(auto j: s){
                if(tmp+j.ff<=k){
                    if(vis[j.ss]==-1){
                        if(ok) cnt+=2;
                        else cnt++;
                        tmp+=j.ff;
                    }else{
                        cnt++;
                        if(vis[j.ss]<j.ff) tmp+=j.ff-vis[j.ss];
                    }
                }
            }
            ans=max(ans,cnt);
        }
    }
    return ans;
}
// int main(){
// 	ios::sync_with_stdio(0);
// 	cin.tie(0);
// 	cout.tie(0);
    
// 	int T=1;
//     // cin>>T;
//     while(T--){
//         int n,x,y,k; cin>>n>>x>>y>>k;
//         vector<int> u(n-1),v(n-1),w(n-1);
//         for(int i=0; i<n-1; i++) cin>>u[i]>>v[i]>>w[i];
//         cout<<max_score(n,x,y,k,u,v,w)<<endl;
//     }
// 	return 0;
// }

Compilation message (stderr)

closing.cpp: In function 'int max_score(int, int, int, long long int, std::vector<int>, std::vector<int>, std::vector<int>)':
closing.cpp:45:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |     for(int i=0; i<w.size(); i++){
      |                  ~^~~~~~~~~

• Subtask 0: 0 / 0
• Subtask 1: 8 / 8
• Subtask 2: 0 / 9
• Subtask 3: 0 / 12
• Subtask 4: 0 / 14
• Subtask 5: 0 / 9
• Subtask 6: 0 / 11
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 17