Submission #429355

#	Time	Username	Problem	Language	Result	Execution time	Memory
429355		jovan_b	Money (IZhO17_money)	C++17	100 / 100	233 ms	14932 KiB

money

#include <bits/stdc++.h>
using namespace std;

using ll = long long;
using ld = long double;

const int MAXN = 1000000;

int bit[MAXN+5];

void bitadd(int x, int val){
    while(x <= MAXN){
        bit[x] += val;
        x += x & -x;
    }
}

int bitget(int x){
    int res = 0;
    while(x){
        res += bit[x];
        x -= x & -x;
    }
    return res;
}

int a[MAXN+5];

int main(){
    ios_base::sync_with_stdio(false), cin.tie(0);
    cout.precision(10);
    cout << fixed;

    int n;
    cin >> n;
    for(int i=1; i<=n; i++) cin >> a[i];
    for(int i=1; i<n; i++) bitadd(a[i], 1);
    int splits = 0;
    int bgn = a[n];
    for(int i=n-1; i>=1; i--){
        if(a[i] > a[i+1]){
            bgn = a[i];
            splits++;
        }
        else{
            if(bitget(bgn-1) - bitget(a[i]) > 0){
                splits++;
                bgn = a[i];
            }
        }
        bitadd(a[i], -1);
    }
    cout << splits + 1 << "\n";
    return 0;
}

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