/in/foo.cc: In function 'bool cheak(int)':
/in/foo.cc:8:9: warning: unused variable 'be' [-Wunused-variable]
     int be = a[1];
         ^~
/in/foo.cc: In function 'int main()':
/in/foo.cc:25:23: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'long long int*' [-Wformat=]
         scanf("%d",a+i);
                       ^