ABC108A - Pair
問題:A - Pair
#include <iostream> using namespace std; int main(void) { int k; cin.tie(0); ios::sync_with_stdio(false); cin >> k; cout << (k / 2) * ((k + 1) / 2) << "\n"; return 0; }
問題:A - Pair
#include <iostream> using namespace std; int main(void) { int k; cin.tie(0); ios::sync_with_stdio(false); cin >> k; cout << (k / 2) * ((k + 1) / 2) << "\n"; return 0; }