oj.uz

답안 #1047538

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1047538 2024-08-07T13:55:22 Z 12345678 Savrsen (COCI17_savrsen) C++17
120 / 120
 229 ms 79932 KB 
#include <bits/stdc++.h>

using namespace std;

#define ll long long

const int nx=1e7+5;

ll a, b, res, dp[nx];
bitset<nx> p;

int main()
{
    cin.tie(NULL)->sync_with_stdio(false);
    cin>>a>>b;
    for (int i=1; i<=b; i++) dp[i]=1;
    for (ll i=2; i<=b; i++)
    {
        if (p[i]) continue;
        for (ll j=i; j<=b; j+=i)
        {
            p[j]=1;
            ll tmp=1, mul=i;
            while ((j%mul)==0) tmp+=mul, mul*=i;
            dp[j]*=tmp;
        }
    }
    //for (int i=1; i<=b; i++) cout<<"debug "<<dp[i]<<'\n';
    for (int i=a; i<=b; i++) res+=abs(dp[i]-2*i);
    cout<<res;
}

Subtask #1
120.0 / 120.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 2 ms 2396 KB Output is correct
4 Correct 220 ms 79708 KB Output is correct
5 Correct 225 ms 79916 KB Output is correct
6 Correct 229 ms 79932 KB Output is correct
7 Correct 201 ms 74492 KB Output is correct
8 Correct 46 ms 23132 KB Output is correct