Submission #884448

#	Time	Username	Problem	Language	Result	Execution time	Memory
884448		ElenaBM	Savrsen (COCI17_savrsen)	C++17	120 / 120	766 ms	78936 KiB

savrsen

#include <bits/stdc++.h>
#define int long long 

using namespace std;

signed main()
{
    int a, b;
    cin>> a >> b;
    int ans = 0;
    vector<int>sdiv(b+1, 1);
    sdiv[1] = 0;
    for (int i = 2; i <= b; ++i){
        for (int j = 2*i; j <= b; j += i){
            sdiv[j] += i;
        }
    }
    for (int i = a; i <= b; ++i) ans += abs(i- sdiv[i]);
    cout<< ans << '\n';
    return 0;
}

• Subtask 1: 120 / 120