Submission #873076

#	Time	Username	Problem	Language	Result	Execution time	Memory
873076		c2zi6	Money (IZhO17_money)	C++14	0 / 100	1 ms	360 KiB

money

#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
#define ff first
#define ss second
#define pb push_back
#define all(a) (a).begin(), (a).end()
#define replr(i, a, b) for (int i = int(a); i <= int(b); ++i)
#define reprl(i, a, b) for (int i = int(a); i >= int(b); --i)
#define rep(i, n) for (int i = 0; i < int(n); ++i)
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> PII;
typedef vector<int> VI;
typedef vector<PII> VPI;
typedef vector<VI> VVI;
typedef vector<VPI> VVPI;
typedef pair<ll, ll> PLL;
typedef vector<ll> VL;
typedef vector<PLL> VPL;
typedef vector<VL> VVL;
typedef vector<VPL> VVPL;
template<class T> T setmax(T& a, T b) {if (a < b) return a = b; return a;}
template<class T> T setmin(T& a, T b) {if (a < b) return a; return a = b;}

int solve(VI a) {
	int n = a.size();

	stack<int> b;
	vector<bool> ka(1e6+1);
	int ans = 1;
	ka[a[0]] = true;
	b.push(0);
	b.push(a[0]);

	for (int i = 1; i < n; i++) {
		if (a[i] < a[i-1]) {
			ans++;
		} else {
			bool fl = false;
			replr(j, b.top()+1, a[i]-1) fl |= ka[j];
			if (fl) ans++;
		}
		b.push(a[i]);
		ka[a[i]] = true;
	}

	return ans;
}

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL), cout.tie(NULL);

	int n;
	cin >> n;
	VI a(n);
	for (int& x : a) cin >> x;
	int ans = solve(a);
	cout << endl << ans << endl;
}

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