제출 #884436

#제출 시각아이디문제언어결과실행 시간메모리
884436ElenaBMSavrsen (COCI17_savrsen)C++17
60 / 120
3065 ms600 KiB
#include <bits/stdc++.h> #define int long long using namespace std; int f (int n){ int ans = 1; if (n == 1) return 0; for (int i = 2; i <= sqrt(n); ++i){ if (i*i == n) ans += i; else if (n%i == 0) ans += i + n/i; } return ans; } signed main() { int a, b; cin>> a >> b; int ans = 0; for (int i = a; i <= b; ++i){ ans += abs(i- f(i)); } cout<< ans << '\n'; return 0; }
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