answer.code: In function ‘int main()’:
answer.code:31:10: error: missing template arguments before ‘dp’
   31 |   vector dp(MAX, INF);
      |          ^~
answer.code:32:3: error: ‘dp’ was not declared in this scope
   32 |   dp[0] = 0;
      |   ^~
answer.code:34:13: warning: structured bindings only available with ‘-std=c++17’ or ‘-std=gnu++17’ [-Wc++17-extensions]
   34 |   for (auto [a, b] : difs) {
      |             ^