#include using namespace std; using ll = long long; using P = pair; #define rep(i, n) for(ll i = 0; i < n; i++) #define all(x) (x).begin(),(x).end() templatebool chmin(T&a, const T&b){if(a>b){a=b;return 1;}return 0;} templatebool chmax(T&a, const T&b){if(a> a >> b; if(a>b) swap(a,b); cout << max((a*2+1)+(b-a-1)*2, 0LL) << '\n'; return 0; }