Compilare: user.c:46:5: warning: return type of ‘main’ is not ‘int’ [-Wmain] int main(){ ^ user.c: In function ‘main’: user.c:51:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%lld%lld", &n, &q); ^ user.c:53:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%lld", &v[i]); ^ user.c:57:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%lld%lld", &a, &b); ^