Submission #147822

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
147822	2019-08-30 19:51:32	mariadinca	Savrsen (COCI17_savrsen)	C++14	120 / 120	2045 ms	78712 KiB

savrsen

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#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;
}
 
 
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• Subtask 1: 120 / 120