제출 #322380

#제출 시각아이디문제언어결과실행 시간메모리
322380fgojkoSavrsen (COCI17_savrsen)C++14
30 / 120
1320 ms39616 KiB
#include <iostream> #include <cmath> #include <vector> using namespace std; int main() { int a, b; cin >> a >> b; vector<int> vec(b+1, 1); vec[1] = 0; for(int i = 2; i <= b/2+1; ++i){ for(int j = i*2; j <= b; j += i){ vec[j] += i; } } int sum = 0; for(int i = a; i <= b; ++i){ sum += abs(vec[i] - i); } cout << sum << endl; return 0; }
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