/in/foo.cc: In function 'int finn(int)':
/in/foo.cc:18:12: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
     return ans;
            ^~~
/in/foo.cc: In function 'int juge(int)':
/in/foo.cc:24:13: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
         now = a[finn(now+x)];
         ~~~~^~~~~~~~~~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:49:24: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
     printf("%d\n", ans);
                        ^