Binge watching

#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>

typedef struct {
    uint64_t a;
    uint64_t b;
} movie;

int comp(const void *m1, const void *m2){
    movie cm1 = *((movie*)m1);
    movie cm2 = *((movie*)m2);
    if (cm1.b == cm2.b) return 0;
    if (cm1.b < cm2.b) return -1;
    return 1;
}

int main() {
    uint64_t n = 0;
    if (scanf("%ld", &n) == 0)
        return EXIT_FAILURE;

    movie *movies = (movie*) malloc(sizeof(movie) * n);
    
    for (uint32_t i = 0; i < n; i++)
        if (scanf("%ld %ld",&movies[i].a, &movies[i].b) == 0)
            return EXIT_FAILURE;

    qsort(movies, n, sizeof(movie), comp);

    uint64_t time = 0;
    uint64_t acc = 0;
    for(uint64_t i = 0; i < n; i++){
        // printf("time : %ld, a : %ld, b: %ld\n", time, movies[i].a, movies[i].b);
        if (movies[i].a >= time){
            time = movies[i].b;
            acc++;
            // printf("acc : %ld\n", acc);
        }
    }
    printf("%ld\n", acc);

    // main algo


    return EXIT_SUCCESS;
}

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