Submission #1053956

#	Time	Username	Problem	Language	Result	Execution time	Memory
1053956		HD1	Closing Time (IOI23_closing)	C++17	0 / 100	90 ms	48272 KiB

closing

#include "closing.h"
#include<bits/stdc++.h>
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define sz(x) ll(x.size())
#define ff first
#define ss second
#define pb push_back
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> ii;
const int MAX=1e6;
const ll mod=1e9+7;
ll distx[MAX], disty[MAX];
vector<ii>gfo[MAX];
vector<ii> ans;
bool vst[MAX];
void dfsx(int u, int f){
    for(auto x:gfo[u]){
        int v=x.ff;
        ll w1=x.ss;
        if(v!=f){
            distx[v]=distx[u]+w1;
            dfsx(v,u);
        }
    }
    return;
}
void dfsy(int u, int f){
    for(auto x:gfo[u]){
        int v=x.ff;
        ll w1=x.ss;
        if(v!=f){
            disty[v]=disty[u]+w1;
            dfsy(v,u);
        }
    }
    return;
}
void clen(int n){
    ans.clear();
    for(int i=0; i<=n; i++){
        gfo[i].clear();
        distx[i]=0;
        disty[i]=0;
        vst[i]=false;
    }
    return;
}
int max_score(int N, int X, int Y, long long K, vector<int> U, vector<int> V, vector<int> W){
    for(ll i=0; i<sz(U) ; i++){
        gfo[U[i]].pb({V[i],W[i]});
        gfo[V[i]].pb({U[i],W[i]});
    }
    dfsx(X,X);
    dfsy(Y,Y);
    for(int i=0; i<N; i++){
        ans.pb({distx[i], i});
        ans.pb({disty[i], i});
    }
    sort(all(ans));
    ll cont=0, sum=0;
    for(auto x:ans){
        if(!vst[x.ss]){
            sum+=x.ff;
            vst[x.ss]=true;
        }
        else{
            sum+=abs(distx[x.ss]-disty[x.ss]);
        }
        if(sum<=K)cont++;
        else break;
    }
    clen(N);
    return cont;
}
// int main(){
//     int N,  X,  Y,  K;
//     vector<int> U, V,  W;
//     max_score(N,X,Y,K,U,V,W);
//     return 0;
// }

• Subtask 0: 0 / 0
• Subtask 1: 0 / 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