class Solution {
public int solution(int[] sides) {
int answer = 0;
int min = Math.min(sides[0], sides[1]);
int max = Math.max(sides[0], sides[1]);
for(int i = 1; i <= max; i++) {
if(max < i + min) {
answer++;
}
}
for(int i = max + 1; i <= max + min; i++) {
if(i < max + min) {
answer++;
}
}
return answer;
}
}