Submission #170472

#	Time	Username	Problem	Language	Result	Execution time	Memory
170472		mcdx9524	Money (IZhO17_money)	C++14	0 / 100	10 ms	380 KiB

money

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

const int N = 1e6 + 7;

int t[N];

int upd(int p, int x) {
    for (; p < N; p = (p | (p + 1))) {
        t[p] += x;
    }
}

int sum(int p) {
    int res = 0;
    for (; p >= 0; p = (p & (p - 1)) - 1) {
        res += t[p];
    }
    return res;
}

int sum(int l, int r) {
    if (l == 0) {
        return sum(r);
    } else {
        return sum(r) - sum(l - 1);
    }
}

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    int n;
    cin >> n;
    vector <int> a(n);
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }
    int ans = 0;
    int prv = 0;
    for (int i = 1; i < n; i++) {
        if (a[i] < a[i - 1] || sum(a[prv] + 1, a[i] - 1)) {
            for (int j = i - 1; j >= prv; j--) {
                upd(a[j], 1);
            }
            prv = i;
            ans++;
        }
    }
    cout << ans + 1 << '\n';
    return 0;
}

Compilation message (stderr)

money.cpp: In function 'int upd(int, int)':
money.cpp:15:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^

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