Submission #35054

#	Time	Username	Problem	Language	Result	Execution time	Memory
35054		model_code	Money (IZhO17_money)	C++14	25 / 100	116 ms	3188 KiB

money

#include <iostream>
#include <cstdio>
#include <algorithm>
#include <cmath>
#include <string>
#include <vector>
#include <stack>
#include <queue>
#include <set>
#include <cstring>
#include <map>
#include <cstdlib>
#include <ctime>
#include <cassert>
#include <bitset>
#define f first
#define s second
#define ll long long
#define ull unsigned long long
#define mp make_pair
#define pb push_back
#define vi vector <int>
#define ld long double
#define pii pair<int, int>
#define y1 sda
using namespace std;    
const int N = int(3e5), mod = int(1e9)  + 7;

int n, a[N]; 

bool check(int l,int r){
	for(int i = l + 1; i <= r; i++){
		if(a[i] < a[i - 1]) return 0;
	}
	for(int i = 0; i < l; i++){
		if(a[i] > a[l] && a[i] < a[r]) return 0;
	}
	return 1;
}


int main () {
	cin >> n;
	for(int i = 0; i < n; i++){
		cin >> a[i];
	}
	int ans = N;
	for(int mask = 0; mask < (1<<n); mask++){
		if(!(mask & 1<<(n - 1))) continue;
		int last = 0;
		bool ok = 1;
		for(int i = 0; i < n; i++){
			if(mask & (1<<i)){
				if(!check(last, i)) ok = 0;
				last = i + 1;
			}
		}		
		if(ok) ans = min(ans, __builtin_popcount(mask));
	}
	cout << ans << "\n";


return 0;
}

• Subtask 1: 9 / 9
• Subtask 2: 16 / 16
• Subtask 3: 0 / 20
• Subtask 4: 0 / 55