0_0_17047002_1276.cpp: In function 'int main()': 0_0_17047002_1276.cpp:5:9: error: conflicting declaration 'double k' double k; ^ 0_0_17047002_1276.cpp:4:10: note: previous declaration as 'long long int k' __int64 k,n,z,t,i,m; ^