Submission #466959

#	Time	Username	Problem	Language	Result	Execution time	Memory
466959		XBoRickie	Savrsen (COCI17_savrsen)	C++11	120 / 120	919 ms	78552 KiB

savrsen

#include <bits/stdc++.h>

using namespace std;

long long imperf[10000001];
int A, B;

int main(){
  cin >> A >> B;
  for(int i=2; i*i<=B; i++){
    for(int j=i; j*i<=B; j++){
      if(i==j){
        imperf[i*j] += i;
      }
      else{
        imperf[i*j] += i+j;
      }
    }
  }
  imperf[1] = 1;

  /*
  for(int i=0; i<=B; i++){
    cout << " " << abs(imperf[i]+1-i);
  }
  cout << endl;
  */

  long long sum = 0;
  for(int i=A; i<=B; i++){
    sum += abs(imperf[i]+1-i);
  }
  
  cout << sum << endl;

  return 0;
}

• Subtask 1: 120 / 120