Submission #893192

#	Time	Username	Problem	Language	Result	Execution time	Memory
893192		Andrey	Money (IZhO17_money)	C++14	100 / 100	1469 ms	73992 KiB

money

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

vector<int> wow(1000001);
vector<int> br(1000001);
set<int> pos;

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    int n;
    cin >> n;
    vector<int> haha(n);
    for(int i = 0; i < n; i++) {
        cin >> haha[i];
    }
    pos.insert(-1);
    for(int i = 0; i < n; i++) {
        pos.insert(i);
    }
    vector<pair<int,int>> wut(n);
    for(int i = 0; i < n; i++) {
        wut[i] = {haha[i],i};
    }
    sort(wut.begin(),wut.end());
    for(int i = n-1; i >= 0; i--) {
        wow[wut[i].first] = i;
    }
    int y = n-1,ans = 0;
    while(y >= 0) {
        int p = wow[haha[y]]-1+br[haha[y]];
        for(int i = y; i >= 0; i--) {
            if(haha[i] != haha[y]) {
                break;
            }
            br[haha[y]]++;
            p++;
        }
        while(y >= 0 && p >= 0 && wut[p].first == haha[y]) {
            y--;
            pos.erase(p);
            p = *(--pos.upper_bound(p));
        }
        ans++;
    }
    cout << ans;
    return 0;
}

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