answer.code: In function ‘int main()’:
answer.code:294:3: error: ‘scanf’ was not declared in this scope
  294 |   scanf("%d", &T);
      |   ^~~~~
answer.code:316:5: error: ‘printf’ was not declared in this scope
  316 |     printf("%lld\n", dp[n]);
      |     ^~~~~~
answer.code:4:1: note: ‘printf’ is defined in header ‘<cstdio>’; did you forget to ‘#include <cstdio>’?
    3 | #include <algorithm>
  +++ |+#include <cstdio>
    4 | #include <functional>