View Compilation Error

0_0_33531679_6172.cpp: In function 'int main()':
0_0_33531679_6172.cpp:66:7: error: redeclaration of 'LL c'
    LL c = nCm(k, r);
       ^
0_0_33531679_6172.cpp:65:7: note: 'LL c' previously declared here
    LL c = x * quick_mod(y, MOD - 2, MOD) % MOD;
       ^