answer.code: In function ‘void decomp(int, std::vector<int>&)’:
answer.code:142:8: error: ‘nsz’ was not declared in this scope; did you mean ‘sz’?
  142 |     if(nsz==1){
      |        ^~~
      |        sz
answer.code: In function ‘int main()’:
answer.code:211:20: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  211 | signed main(){fread(Buf,1,BUFSIZE,stdin);
      |               ~~~~~^~~~~~~~~~~~~~~~~~~~~