Binge watching

#include <iostream>
#include <vector>
#include <bits/stdc++.h>

using namespace std;

int main() {
    int n;
    cin >> n;
    vector<vector<int>> movies(n);
    for (int i = 0; i < n; i++) {
        int a, b;
        cin >> a >> b;
        movies[i].push_back(a);
        movies[i].push_back(b);
    }
    sort(movies.begin(), movies.end(), [](const auto &a, const auto &b) {
        if (a[1] == b[1]) return a[0] > b[0];
        return a[1] < b[1];
    });

    int end = movies[0][1];
    int nbr = 0;
    for (int i = 1; i < n; i++) {
        if (movies[i][0] >= end) {
            end = movies[i][1];
        } else {
            nbr++;
        }
    }
    cout << n - nbr;
    return 0;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED