Submission #1086113

#	Time	Username	Problem	Language	Result	Execution time	Memory
1086113		duytuandao21	Po (COCI21_po)	C++17	20 / 70	1093 ms	2908 KiB

Main

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

const int N = 2e5 + 7;
const int inf = 1e9 + 7;
const long long infll = 1e18 + 7;

int n;
int bit[N], a[N];
pair<int, int> b[N];
bool cmp(pair<int, int> x, pair<int, int> y) {
    if (x.first == y.first) return x.second < y.second;
    return x.first < y.first;
}
void update(int x, int v) {
    while (x <= n) {
        bit[x] = min(bit[x], v);
        x += (x & -x);
    }
}
int get(int l, int r) {
    int ans = inf;
    while (l <= r) {
        if (r - (r & -r) >= l) {
            ans = min(ans, bit[r]);
            r -= (r & -r);
        } else {
            ans = min(ans, a[r]);
            r--;
        }
    }
    return ans;
} 
int main() 
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin >> n;
    for (int i = 1; i <= n; i++) bit[i] = inf;
    for (int i = 1; i <= n; i++) {
        cin >> a[i];
        update(i, a[i]);
        b[i] = make_pair(a[i], i);
    }
    sort (b + 1, b + 1 + n, cmp);
    int res = 0;
    for (int i = 1; i <= n; i++) {
        if (b[i].first != b[i - 1].first) {
            res++; 
        }
        else {
            if (get(b[i - 1].second, b[i].second) < b[i].first) res++;
        }
    }
    cout << res;
    return 0;
}

• Subtask 1: 20 / 70