oj.uz

Submission #249372

# Submission time Handle Problem Language Result Execution time Memory
249372 2020-07-14T17:53:18 Z tushar_2658 Trol (COCI19_trol) C++14
50 / 50
 1 ms 256 KB 
#include "bits/stdc++.h"
using namespace std;

const int maxn = 105;
using ll = long long;

int get(ll x){
  while(x > 9){
    int sum = 0;
    while(x > 9){
      sum += x % 10;
      x /= 10;
    }
    sum += x;
    x = sum;
  }
  return x;
}

ll f(ll x){
  ll ret = 45 * (x / 9);
  x %= 9;
  ret += (x * (x + 1))/2;
  return ret;
}

int main(int argc, char const *argv[])
{
  int q;
  scanf("%d", &q);
  while(q--){
    ll l, r;
    scanf("%lld %lld", &l, &r);
    printf("%lld\n", f(r) - f(l - 1));
  }

  return 0;
}

Compilation message

trol.cpp: In function 'int main(int, const char**)':
trol.cpp:30:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &q);
   ~~~~~^~~~~~~~~~
trol.cpp:33:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lld %lld", &l, &r);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~

Subtask #1
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 0 ms 256 KB Output is correct
4 Correct 0 ms 256 KB Output is correct
5 Correct 0 ms 256 KB Output is correct