Submission #80570

#	Time	Username	Problem	Language	Result	Execution time	Memory
80570		tpoppo	Savrsen (COCI17_savrsen)	C++14	120 / 120	2196 ms	79112 KiB

savrsen

#include <bits/stdc++.h>

using namespace std;
using ll = long long;
const ll MAXN = 1e7+1;
ll a,b,res;
ll sumDiv[MAXN];

int main(){
	cin.tie(0);
	ios_base::sync_with_stdio(false);
	cin>>a>>b;
	for(int i=1;i<=b;i++){
		for(int j=i;j<=b;j+=i)
			sumDiv[j]+=i;
	}

	for(;a<=b;a++) res += abs(2*a - sumDiv[a]);
	cout<<res;
	return 0;
}

• Subtask 1: 120 / 120