ABC045A - 台形 / Trapezoids
#include <iostream> using namespace std; int main(void) { int a, b, h; cin.tie(0); ios::sync_with_stdio(false); cin >> a; cin >> b; cin >> h; cout << (a + b) * h / 2 << "\n"; return 0; }
#include <iostream> using namespace std; int main(void) { int a, b, h; cin.tie(0); ios::sync_with_stdio(false); cin >> a; cin >> b; cin >> h; cout << (a + b) * h / 2 << "\n"; return 0; }