Submission #344293

#	Time	Username	Problem	Language	Result	Execution time	Memory
344293		infertechno2	Money (IZhO17_money)	C++14	100 / 100	204 ms	14604 KiB

money

#include <bits/stdc++.h>
 
#define ios ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
#define file(s) if (fopen(s".in", "r")) freopen(s".in", "r", stdin), freopen(s".out", "w", stdout)
#define all(a) a.begin() , a.end()
#define F first
#define S second
 
using namespace std;
using ll = long long;
 
const int N = 1e6+5 , inf = 2e9 + 7;
const ll INF = 1e18 ,   mod = 1e9+7 , P = 6547;
 
int f[N] , a[N];
 
int get(int x) {
	int res = 0;
	for(; x > 0; x&=x+1 , x--) {
		res += f[x];
	}
	return res;
}
 
int get(int l , int r) {
	if(r < l) return 0 ;
	return get(r) - get(l-1);
}
 
void upd(int pos) {
	for(; pos < N; pos |= pos+1) {
		f[pos] ++;
	}
}
 
void solve() {
	int n;
	cin >> n;
	for(int i = 1; i <= n; i ++) {
		cin >> a[i];
	}
	int ans = 0;
	for(int i = 1; i <= n; i ++) {
		int st = i;
		while(a[i] <= a[i+1] && get(a[st] + 1 , a[i+1] - 1) == 0) {
			i ++;
		}
		for(int j = st; j <= i; j ++) upd(a[j]);
		ans ++;
	}
	cout << ans;
}
/*
5 5 6 5 5
*/
main() {
    ios;
    int tt = 1;
    //cin >> tt;
    while(tt --) {
        solve();
    }
    return 0;
}

Compilation message (stderr)

money.cpp:56:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   56 | main() {
      |      ^

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