#include <iostream>
#include <algorithm>
#include <cmath>
using namespace std;

int main() {
    int S1,S2,S3;
    cin>>S1>>S2>>S3;
    int nums[121] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
    int ans = 0;

    for(int i=1;i<=S2;++i){
        for(int j=1;j<=S1;++j){
            for(int z=1;z<=S3;++z){
                nums[i+j+z]++;
                }

            }
        }



    for(int i=3;i<S1+S2+S3+1;i++){
        if(ans<nums[i]){
            ans = nums[i];
        }

    }
    cout<<ans;


    return 0;
}