Submission #204951

#	Time	Username	Problem	Language	Result	Execution time	Memory
204951		dolphingarlic	Money (IZhO17_money)	C++14	0 / 100	5 ms	380 KiB

money

#include <bits/stdc++.h>
#define FOR(i, x, y) for (int i = x; i < y; i++)
typedef long long ll;
using namespace std;

int n, a[1000001], bit[1000001];

void update(int pos) {
    for (; pos <= n; pos += (pos & (-pos))) bit[pos]++;
}

int query(int a, int b) {
    int ans = 0;
    for (; b; b -= (b & (-b))) ans += bit[b];
    for (; a; a -= (a & (-a))) ans -= bit[a];
    return ans;
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cin >> n;
    FOR(i, 0, n) cin >> a[i];
    int ans = 1;
    FOR(i, 1, n) {
        if (a[i] < a[i - 1] || query(a[i - 1], a[i])) ans++;
        update(a[i]);
    }
    cout << ans;
    return 0;
}

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