Missing Coin Sum

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

#define LOOP(i,s,e) for (uint64_t i = (s); i < (e); i++)
#define SCAN(...) if (scanf(__VA_ARGS__) == 0) return EXIT_FAILURE

int comp(const void *a, const void *b){
    uint64_t *ai = (uint64_t*) a;
    uint64_t *bi = (uint64_t*) b;
    if (*ai == *bi)
        return 0;
    if (*ai < *bi)
        return -1;
    // (*ai > *bi)
    return 1;
}

int main() {
    uint64_t n = 0;
    SCAN("%ld", &n);

    // main algo

    uint64_t coins[n];

    LOOP(i, 0, n)
        SCAN("%ld", coins + i);

    qsort(coins, n, sizeof(uint64_t), comp);

    uint64_t acc = 0;
    LOOP(i, 0, n){
        if (acc + 1 < coins[i]){
            printf("%ld\n", acc + 1);
            exit(EXIT_SUCCESS);
        }
        acc += coins[i];
    }
    printf("%ld\n", acc + 1);

    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

Test 10

Verdict: ACCEPTED