Submission #1128137

#	Time	Username	Problem	Language	Result	Execution time	Memory
1128137		BilAktauAlmansur	Money (IZhO17_money)	C++20	0 / 100	1 ms	324 KiB

money

#include <bits/stdc++.h>
#pragma optimize("g", on)
// #pragma GCC optimize ("inline")
// #pragma GCC optimize ("Ofast")
// #pragma GCC optimize ("unroll-loops")
#pragma GCC optimize ("03")
#pragma GCC target ("sse,sse2,sse3,ssse3,sse4,popcnt,abm,avx2,mmx,fma,avx,tune=native")
void Freopen () {
    #ifndef ONLINE_JUDGE
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
    #endif
}
using namespace std;
#define fi first
#define se second
#define int long long
const int N = 250000 + 7, M = 250000;

int n, a[N], dp[N], d[N];
signed main() {
	// freopen("duty.in", "r", stdin);
	// freopen("duty.out", "w", stdout);
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	// cout.tie(NULL);
	//Freopen();
	cin>>n;
	for(int i = 1; i <= n; i++) {
		cin>>a[i];
		d[i] = 1e9;
	}	
	dp[n + 1] = 1, d[n + 1] = 0;
	for(int i = n; i >= 1; i--) {
		vector<int> vec;
		for(int j = i; j <= n; j++) {
			int mx = -1, mn = 1e9;
			for(int l = j; l <= n; l++) {
				if(!dp[l + 1])continue;
				for(int k = j + 1; k <= l; k++) {
					mx = max(mx, a[k]), mn = min(mn, a[k]);
				}
				if(mx == -1) {
					bool ans = 1;
					for(int k = i + 1; k <= j; k++) {
						if(a[k] < a[k - 1]) {
							ans = 0;
							break;
						}
					}
					if(ans)dp[i] = 1, d[i] = min(d[i], d[j + 1] + 1);
				}else {
					bool ans = 1;
					for(int k = i + 1; k <= j; k++) {
						if(a[k] < a[k - 1]) {
							ans = 0;
							break;
						}
					}
					if(ans) {
						for(int k = i; k <= j; k++) {
							if(a[k] > mn && a[k] < mx) {
								ans = 0;
								break;
							}
						}
						if(ans)dp[i] = 1, d[i] = min(d[i], d[j + 1] + 1);
					}
				}
			}
		}
		// cout << i << ' ' << d[i] << '\n';
	}
	cout << d[1] << '\n';
}
/*
please AC

*/

Compilation message (stderr)

money.cpp: In function 'void Freopen()':
money.cpp:10:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |     freopen("input.txt", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
money.cpp:11:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |     freopen("output.txt", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

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