Submission #143847

#	Time	Username	Problem	Language	Result	Execution time	Memory
143847		MladenP	Money (IZhO17_money)	C++17	0 / 100	2 ms	408 KiB

money

#include <bits/stdc++.h>
#define MAXN 1000010
#define PRINT(x) cerr<<#x<<'='<<x<<endl;
using namespace std;
int a[MAXN], bit[MAXN], N, n, rez;
int query(int idx) {
    int rez = 0;
    for( ; idx ; idx -= idx&-idx) rez += bit[idx];
    return rez;
}
void update(int idx, int val) {
    for( ; idx < MAXN; idx += idx&-idx) bit[idx] += val;
}
int main() {
    cin >> n;
    N = 1;
    for(int i = 1; i <= n; i++) {
        cin >> a[N];
        if(a[N] != a[N-1]) N++;
    }
    N--;
    rez = 1;
    for(int i = 2; i <= N; i++) {
        if(a[i-1] > a[i] || query(a[i]-1) > query(a[i-1]-1)) {
            rez++;
        }
        update(a[i-1], +1);
    }
    cout << rez;
    return 0;
}

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