View Compilation Error

0_0_34844204_2621.cpp: In function 'int main()':
0_0_34844204_2621.cpp:53:28: error: conflicting declaration 'long long unsigned int ans'
         unsigned long long ans = (res1 - res2%mod * m%mod + mod)%mod;
                            ^
0_0_34844204_2621.cpp:32:13: note: previous declaration as 'ull ans'
         ull ans=0,res1=1,res2=1;
             ^