Submission

Score: 100

User: Pera

Problemset: ขายรถยนต์

Language: cpp

Time: 0.032 second

Submitted On: 2025-09-23 13:14:56

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

int main() {
    ios_base::sync_with_stdio(false);

    int n; cin >> n;
    vector<int> prices(n);
    vector<int> efficiency(n);

    for (int i = 0; i < n; i++) {
        cin >> prices[i] >> efficiency[i];
    }

    vector<int> sufMax(n+1, INT_MIN);
    for (int i = n-1; i >= 0; --i) {
        sufMax[i] = max(efficiency[i], sufMax[i+1]);
    }

    int cantSell = 0;
    for (int i = 0; i < n-1; ++i) {
        if (sufMax[i+1] > efficiency[i]) ++cantSell;
    }

    cout << cantSell << "\n";
    return 0;
}