Maximum sum

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

int64_t max2(int64_t a, int64_t b){
    return a > b ? a : b;
}

int main() {
    int64_t n = 0;
    if (scanf("%ld", &n) == 0)
        return EXIT_FAILURE;

    // main algo

    int64_t *tab = (int64_t*) malloc(n * sizeof(int64_t));
    int64_t *tmp = (int64_t*) calloc(n, sizeof(int64_t));

    for (int64_t i = 0; i < n; i++){
        if (scanf("%ld",tab + i) == 0)
            return EXIT_FAILURE;
    }
    int64_t maxi = tab[0];

    for (int64_t size = 0; size <= n; size++){
        for (int64_t i = 0; i < n - size; i++){
            tmp[i] = tmp[i] + tab[i+size];
            maxi = max2(maxi, tmp[i]);
        }
    }


    printf("%ld\n", maxi);

    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: TIME LIMIT EXCEEDED

Test 7

Verdict: TIME LIMIT EXCEEDED

Test 8

Verdict: TIME LIMIT EXCEEDED

Test 9

Verdict: TIME LIMIT EXCEEDED

Test 10

Verdict: TIME LIMIT EXCEEDED

Test 11

Verdict: ACCEPTED

Test 12

Verdict: ACCEPTED

Test 13

Verdict: ACCEPTED

Test 14

Verdict: ACCEPTED

Test 15

Verdict: ACCEPTED