Submission #1201339

#	Time	Username	Problem	Language	Result	Execution time	Memory
1201339		PagodePaiva	Closing Time (IOI23_closing)	C++20	0 / 100	32 ms	5188 KiB

closing

#include "closing.h"
#include<bits/stdc++.h>

using namespace std;
const long long N = 3010;

vector <pair <long long, long long>> g[N];
long long v[N];
long long custo[N];
long long pref[N], pref2[N];

int max_score(int n, int X, int Y, long long k,
              std::vector<int> U, std::vector<int> V, std::vector<int> W){
    for(int i = 0;i < n;i++){
        g[i].clear();
        v[i] = 0;
        custo[i] = 0;
        pref[i] = pref2[i] = 0;
    }
    for(long long i = 0;i < n-1;i++){
        g[U[i]].push_back({V[i], W[i]});
        g[V[i]].push_back({U[i], W[i]});
        v[i] = W[i];
    }
    for(int i = X-1;i >= 0;i--){
        pref[i] = pref[i+1] + v[i];
    }
    for(int i = X+1;i < N;i++){
        pref[i] = pref[i-1] + v[i-1]; 
    }
    for(int i = Y-1;i >= 0;i--){
        pref2[i] = pref2[i+1] + v[i];
    }
    for(int i = Y+1;i < N;i++){
        pref2[i] = pref2[i-1] + v[i-1]; 
    }
    int res = 0;
    for(int l = 0;l <= X;l++){
        for(int r = X;r < n;r++){
            //cout << l << ' ' << r << '\n';
            long long gasto = 0;
            for(int j = l;j <= r;j++){
                gasto += pref[j]; 
            }
            if(gasto > k){
                //cout << "1: ";
                //cout << gasto << '\n';
                continue;
            }
            int ans = r-l+1;
            for(int i = 0;i < l-1;i++)
                custo[i] = pref2[i];
            for(int i = l;i <= r;i++){
                custo[i] = max(pref[i], pref2[i]) - pref[i];
            }
            for(int i = r+1;i < n;i++){
                custo[i] = pref2[i];
            }
            int pl = Y;
            while(gasto <= k){
                if(pl < 0) 
                    break;
                if(gasto+custo[pl] <= k){
                    gasto += custo[pl];
                    pl--;
                }
                else
                    break;
            }   
            pl++; 
            res = max(res, ans + Y-pl+1);
            for(int i = Y+1;i < n;i++){
                //cout << "2: " << pl << ' ' << i-1 << '\n'; 
                res = max(res, ans + i-pl);
                gasto += custo[i];
                while(gasto > k){
                    if(pl > Y)
                        break;
                    gasto -= custo[pl];
                    pl++;
                }
                if(pl > Y)
                    break;
            }
        }
    }
    return res  ;
}

• 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