Submission #535697

#	Time	Username	Problem	Language	Result	Execution time	Memory
535697		pokmui9909	다각형 (GA5_polygon)	C++17	100 / 100	1 ms	328 KiB

polygon

#include <bits/stdc++.h>
using namespace std;
using ll = long long;

int main(){
    cin.tie(0) -> sync_with_stdio(false);

    ll L, R; cin >> L >> R;
    cout << (R <= 2 ? 2 : (R / 2) * (R / 2 + 1)) - (L - 1 <= 2 ? 2 : ((L - 1) / 2) * ((L - 1) / 2 + 1));
}

• Subtask 1: 60 / 60
• Subtask 2: 10 / 10
• Subtask 3: 30 / 30