Submission #1128725

#	Time	Username	Problem	Language	Result	Execution time	Memory
1128725		BilAktauAlmansur	Money (IZhO17_money)	C++20	100 / 100	849 ms	55232 KiB

money

#include <bits/stdc++.h>
#pragma optimize("g", on)
#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 = 1e6 + 7, M = 1e5 + 1, mod = 1e9 + 7;

int n, a[N];
void solve() {
	cin>>n;
	for(int i = 1; i <= n; i++)cin>>a[i];
	multiset<int> st;
	int ans = 0;
	st.insert(1e9);
	for(int i = 1; i <= n;) {
		auto it = *st.upper_bound(a[i]);
		st.insert(a[i]);
		int last = i;
		for(int j = i + 1; j <= n; j++) {
			if(a[j] < a[j - 1])break;
			if(a[j] > it)break;
			st.insert(a[j]);
			last = j;
		}
		// cout << i << ' ' << last << '\n';
		i = last + 1, ans ++;
	}
	cout << ans << '\n';
}
signed main() {
	// freopen("duty.in", "r", stdin);
	// freopen("duty.out", "w", stdout);
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	//Freopen();
	int T = 1;
	// cin>>T;
	while(T --)solve();
}

Compilation message (stderr)

money.cpp: In function 'void Freopen()':
money.cpp:7:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    7 |     freopen("input.txt", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
money.cpp:8:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    8 |     freopen("output.txt", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

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