/in/foo.cc: In function 'void Prime(int)':
/in/foo.cc:22:4: error: '__int64' was not declared in this scope
    __int64 k=i*prime[j];
    ^~~~~~~
/in/foo.cc:22:4: note: suggested alternative: '__int64_t'
    __int64 k=i*prime[j];
    ^~~~~~~
    __int64_t
/in/foo.cc:23:8: error: 'k' was not declared in this scope
    vis[k]=1;
        ^