int N;
int P;
int a[5];
int b[5];
int c[5];

void* f(void* args) {
    int id = *((int *)args);
    int dim = (N + P - 1) / P;
    int start = dim * id;
    int end = dim * (id + 1);
    if(end > N) {
        end = N;
    }
    for(int i = start; i < end; ++i) {
        c[i] = a[i] + b[i];
    }
    return NULL;
}