/* for l = 8, r = 26 */
include
include
include
include
using namespace std; using L = long; using LL = long long;
int main() {
int t;
cin >> t;
while (t--) {
LL l, r;
cin >> l >> r;
LL res = (r >= 2 * l) ? (r - 1) / 2 : (r - l);
cout << res << endl;
}
return 0;} /* how it is so that the answer is not 18 but 12!??? thanks, */
you were wrong, you wrote that in the true case (r — 1), the place is (r — l), that's why you get 12
so if the machine compiles and executes the code, the answer is 12 which is correct and accepted, BUT, if I would be to do it with my own brain, I get 18, check this out: "LL res = (26 >= 2 * 8) ? (26-1)/2 : (26-8);" this is what my brain computes: is 26 bigger or equal than 16 ? if it's true: 12 for false: 18; it went accepted like this...should I stop doing push_ups while programming cause my eye bulges are popping red and I make the machine see floats ?
So it's true isn't it :)
It should be
long long res = (r>=2*l)? (r-l) : (r-1)/2;