Submission #249372

#	Time	Username	Problem	Language	Result	Execution time	Memory
249372		tushar_2658	Trol (COCI19_trol)	C++14	50 / 50	1 ms	256 KiB

trol

#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 (stderr)

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 / 50