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This file contains ambiguous Unicode characters!

This file contains ambiguous Unicode characters that may be confused with others in your current locale. If your use case is intentional and legitimate, you can safely ignore this warning. Use the Escape button to highlight these characters.

#include <bits/stdc++.h>
using namespace std;
int n, m;
int ans;
int main() {
cin >> n >> m;
//出发点特判
if (n == 1 && m == 1) {
puts("1");
return 0;
}
//奇偶行分类然后n = m特判
//如果n是奇数
if (n & 1) {
ans = n + m - 1;
if (n == m) ans--;
} else // n是偶数
ans = n + (m - 1) / 2 * 2;
printf("%d", ans);
return 0;
}