#include<bits/stdc++.h> using namespace std; int a,b,x,y; int gcd(int m,int n){ if(n==0) return m; else return gcd(n,m%n); } int main(){ ios::sync_with_stdio(false); cin.tie(0); cin>>a>>b>>x>>y; int res=2*(a+b+1-gcd(a,b)); if(a%2==0||b%2==0) res--; cout<<res<&l...