View Compilation Error

0_0_38684581_3388.cpp:154:6: error: 'i64' in namespace 'std' does not name a type
  154 | std::i64 f[N],inf[N];
      |      ^~~
0_0_38684581_3388.cpp: In function 'void inin()':
0_0_38684581_3388.cpp:178:5: error: 'f' was not declared in this scope
  178 |     f[0] = inf[0] = 1;
      |     ^
0_0_38684581_3388.cpp:178:12: error: 'inf' was not declared in this scope; did you mean 'sinf'?
  178 |     f[0] = inf[0] = 1;
      |            ^~~
      |            sinf
0_0_38684581_3388.cpp: In function 'long long int C(int, int)':
0_0_38684581_3388.cpp:193:12: error: 'f' was not declared in this scope
  193 |     return f[n] * inf[m] % mod * inf[n - m] % mod;
      |            ^
0_0_38684581_3388.cpp:193:19: error: 'inf' was not declared in this scope; did you mean 'sinf'?
  193 |     return f[n] * inf[m] % mod * inf[n - m] % mod;
      |                   ^~~
      |                   sinf