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0_0_38739071_18813.cpp: In function 'long long int C(long long int, long long int)':
0_0_38739071_18813.cpp:19:36: error: 'mo' was not declared in this scope; did you mean 'm'?
   19 |         return 1ll*jie[x]*inv[y] % mo*inv[x-y] % mo;
      |                                    ^~
      |                                    m