제출 #1337823

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1337823		spuike	선물 (IOI25_souvenirs)	C++20	22 / 100	12 ms	348 KiB

souvenirs

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ull unsigned long long
#define ld long double
#define fi first
#define se second
pair<vector<int>, long long> transaction(long long M);
void buy_souvenirs(int N, long long P0){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    if(N==2){
        transaction(P0-1);
    }
    else if(N==3){
        pair<vector<int>, long long>p=transaction(P0-1);
        if(p.fi.size()==1){
            transaction(P0-1-p.se-1);
            transaction(P0-1-p.se-1);
        }
        else{
            transaction((P0-1-p.se)/2);
        }
    }
    else{
        ll pi=P0;
        ll k=0;
        for(int i=1;i<N-1;i++){
            pair<vector<int>, long long>p=transaction(pi-1);
            if(p.fi.size()==1){
                pi-=p.se;
            }
            else{
                pi-=p.se-1;
                k++;
            }
            for(int j=N;j>N-i;j--){
                transaction(pi-1);
            }
        }
        while(k<N){
            transaction(pi-1);
            k++;
        }
    }
}

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