제출 #695186

#제출 시각아이디문제언어결과실행 시간메모리
695186TAhmed33Savrsen (COCI17_savrsen)C++98
120 / 120
1189 ms78668 KiB
#include <bits/stdc++.h> using namespace std; #define int long long #define endl '\n' const int MOD = 1e9 + 7; int divs[10000001] = {}; signed main () { ios::sync_with_stdio(false); cin.tie(0); cout.tie(0); for (int i = 1; i <= 1e7; i++) { for (int j = 2 * i; j <= 1e7; j += i) { divs[j] += i; } } int a, b; cin >> a >> b; int sum = 0; for (int i = a; i <= b; i++) sum += abs(i - divs[i]); cout << sum << endl; }
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