answer.code: In function ‘__int128 unsigned encode(int, const int*)’:
answer.code:45:5: error: ‘u128’ was not declared in this scope
   45 |     u128 res = 0;
      |     ^~~~
answer.code:48:13: error: ‘res’ was not declared in this scope
   48 |             res += f[n - 1][a + 1][b];
      |             ^~~
answer.code:54:12: error: ‘res’ was not declared in this scope
   54 |     return res;
      |            ^~~
grader_encoder.cpp: In function ‘__int128 unsigned {anonymous}::read()’:
grader_encoder.cpp:7:45: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
    7 | #define gc() ((buff == buf + 100000 ? (fread(buf,1,100000,stdin),buff = buf) : 0),*(buff++))
      |                                        ~~~~~^~~~~~~~~~~~~~~~~~~~
grader_encoder.cpp:12:17: note: in expansion of macro ‘gc’
   12 |         int c = gc();
      |                 ^~
grader_encoder.cpp:7:45: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
    7 | #define gc() ((buff == buf + 100000 ? (fread(buf,1,100000,stdin),buff = buf) : 0),*(buff++))
      |                                        ~~~~~^~~~~~~~~~~~~~~~~~~~
grader_encoder.cpp:13:39: note: in expansion of macro ‘gc’
   13 |         while(c < '0' || c > '9') c = gc();
      |                                       ^~
grader_encoder.cpp:7:45: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
    7 | #define gc() ((buff == buf + 100000 ? (fread(buf,1,100000,stdin),buff = buf) : 0),*(buff++))
      |                                        ~~~~~^~~~~~~~~~~~~~~~~~~~
grader_encoder.cpp:14:62: note: in expansion of macro ‘gc’
   14 |         while(c >= '0' && c <= '9') x = x * 10 + c - '0',c = gc();
      |                                                              ^~