Submission #1249519

#	Time	Username	Problem	Language	Result	Execution time	Memory
1249519		FernandoJC07	Souvenirs (IOI25_souvenirs)	C++20	39 / 100	12 ms	400 KiB

souvenirs

#include "souvenirs.h"
#define ff first
#define ss second
#define ll long long
#define vi vector<ll> 
using namespace std;
void buy_souvenirs(int N, ll P0){
    if(N==2) {transaction(P0-1); return;}
    if(N==3) {
        auto x = transaction(P0-1);
        if(x.ff.size() == 1){
            ll val = P0-1-x.ss;
            transaction(val-1);
            transaction(val-1);
        }
        else {
            ll val = (P0-1-x.ss);
            val += (2-val%2)%2;
            val/=2;
            transaction(val-1);
        }
        return;
    }
    vi cnt(N, 0), val(N);
    val[0] = P0;
    for(int i = 1; i<N; ++i){
        auto x = transaction(val[i-1]-1);
        for(int y: x.ff) cnt[y]++;
        if(x.ff.size() == 1) val[i] = val[i-1]-1-x.ss;
        else val[i] = val[i-1]-2;
    }
    for(int i = 1; i<N; ++i) while(cnt[i]<i) {transaction(val[i]); cnt[i]++;}
}

• Subtask 0: 0 / 0
• Subtask 1: 4 / 4
• Subtask 2: 3 / 3
• Subtask 3: 14 / 14
• Subtask 4: 18 / 18
• Subtask 5: 0 / 28
• Subtask 6: 0 / 33