Compilare: user.c: In function ‘M_R_test’: user.c:19:5: warning: type of ‘n’ defaults to ‘int’ [enabled by default] int M_R_test(n){ ^ user.c: In function ‘main’: user.c:73:23: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(n==1 || !(n%2) && n!=2){ ^ user.c:79:5: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long long int’ [-Wformat=] ans += M_R_test(n); printf("%d\n", ans); ^ user.c:68:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%lld", &T); ^ user.c:71:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%lld", &n); ^