/in/foo.cc: In function 'void cal(int, int)':
/in/foo.cc:6:8: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses]
     if (jj) if (jj%2==0) u+=z/kk;else u-=z/kk;
        ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:24:20: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
     printf("ll%d",n);
                    ^