제출 #1133776

#제출 시각아이디문제언어결과실행 시간메모리
1133776lopkusSavrsen (COCI17_savrsen)C++20
30 / 120
568 ms39496 KiB
#include <bits/stdc++.h> using namespace std; const int N = 1e7 + 5; vector<int> D(N, 0); int main() { ios::sync_with_stdio(false); cin.tie(0); for(int i = 1; i < N; i++) { for(int j = i; j < N; j+= i) { D[j] += i; } } for(int i = 1; i < N; i++) { D[i] = D[i - 1] + abs((D[i] - i) - i); } int l, r; cin >> l >> r; cout << D[r] - D[l - 1]; }
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