foo.cpp: In function 'int main()':
foo.cpp:12:18: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'long long int*' [-Wformat=]
 scanf("%d", &a[i]);
                  ^
foo.cpp:28:17: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
 printf("%d", ans);
                 ^
foo.cpp:29:9: error: expected '}' at end of input
 return 0;
         ^