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2 years ago
#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;
}