View Compilation Error

0_0_18296683_25052.cpp: In function 'void convolution(int*, int*, int*, int, int)':
0_0_18296683_25052.cpp:78:32: error: 'LL' was not declared in this scope
  for (int i=0;i<num;i++) c[i]=(LL)(C[i].x+0.5)%mod;
                                ^