제출 #856117

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
856117		vjudge1	Savrsen (COCI17_savrsen)	C++17	120 / 120	757 ms	78932 KiB

savrsen

#pragma GCC optimize("unroll-loops,Ofast,O3")
#include <bits/stdc++.h>
#define pb push_back
#define mp make_pair
#define spc << " " <<
#define endl "\n"
#define all(x) x.begin(), x.end()
#define int long long
#define ii pair<int,int>
#define vi vector<int>
#define vii vector<ii>
#define st first
#define nd second
#define inf 1000000009
#define MOD 1000000007
#define lim 200005
using namespace std;




int ans[10000005];
void build(){
    for(int i=1; i<=10000000; i++){
        int cur=i;
        while(cur+i <= 10000000){
            cur+=i;
            ans[cur]+=i;
        }
    }
}



void solve(){
    memset(ans, 0, sizeof(ans));
    build();
    int a,b; cin >> a >> b;
    int res=0;
    for(int i=a; i<=b; i++){
        res += abs(ans[i] - i);
    }
    cout << res << endl;
}



signed main(){
    ios_base::sync_with_stdio(false);cin.tie(0);
    #ifdef Local
    freopen("in","r",stdin);
    freopen("out","w",stdout);
    #endif

    int t=1;
    //cin >> t;
    while(t--) solve();
}

• Subtask 1: 120 / 120