Submission #2699007

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Source Code Expand

#define _GLIBCXX_DEBUG
#include <iostream>
#include <cmath>
#include <vector>
#include <string>

typedef long long ll;

const ll INF = 1e10;
int main(int argc, char* argv[])
{
  ll N;
  std::cin >> N;

  ll ans = INF;
  for (ll a = 1; a < N; a++) {
    ll sum = 0;
    ll val_a = a;
    while (val_a > 0) {
      sum += val_a % 10;
      val_a /= 10;
    }

    ll val_b = N - a;
    while (val_b > 0) {
      sum += val_b % 10;
      val_b /= 10;
    }

    ans = std::min(ans, sum);
  }

  std::cout << ans << std::endl;
  return 0;
}

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