oj.uz

답안 #466959

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
466959 2021-08-21T04:01:07 Z XBoRickie Savrsen (COCI17_savrsen) C++11
120 / 120
 919 ms 78552 KB 
#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
120.0 / 120.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 2 ms 1100 KB Output is correct
4 Correct 910 ms 78552 KB Output is correct
5 Correct 919 ms 78544 KB Output is correct
6 Correct 895 ms 78548 KB Output is correct
7 Correct 843 ms 72392 KB Output is correct
8 Correct 180 ms 20176 KB Output is correct