제출 #971208

#제출 시각아이디문제언어결과실행 시간메모리
971208vjudge1Trol (COCI19_trol)C++98
0 / 50
1047 ms600 KiB
#include <bits/stdc++.h>
using namespace std;
int sumDigits(int num) {
  int sum = 0;
  while (num > 0) {
    sum += num % 10;
    num /= 10;
  }
  if(sum>9){
    return sumDigits(sum);
  }else{
    return sum;
  }
}
int main(){
    int q;
    cin>>q;
    while (q--)
    {
        long long l,r;
        cin>>l>>r;
        int awal=sumDigits(l);
        int ans=awal;
        int tambahan=2;
        int z=awal;
        for (int i = 0; i < r-l; i++)
        {
            if(z==9){
                z=1;
                tambahan=1;
            }
            ans+=tambahan;
            tambahan++;
            z++;
        }
        cout<<ans<<endl;
    }
    
}
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