Submission #147822

#	Time	Username	Problem	Language	Result	Execution time	Memory
147822		mariadinca	Savrsen (COCI17_savrsen)	C++14	120 / 120	2045 ms	78712 KiB

savrsen

#include <iostream>

using namespace std;

int a, b, i, j;
long long x, sol, sum[10000001];

int main(){
    cin>>a>>b;
    if(a == 1)
        sol = 1;
    for(i=2;i<=b;i++){
        for(j=i+i;j<=b;j+=i)
            sum[j] += i;
        x = sum[i] + 1 - i;
        x = max(x, -x);
        if(i >= a)
            sol += x;
    }
    cout<<sol;
    return 0;
}

• Subtask 1: 120 / 120