俄罗斯套娃

#include<bits/stdc++.h>
using namespace std;
int main(){
    int n,cnt=0;
    cin >> n;
    for(int i = 1;i<n;i++){
        if(i%10 == 2 || i/10%10 == 2 || i/100%10 == 2 || i%10 == 4 || i/10%10 == 4 || i/100%10 == 4)continue;
        for(int j = i;j<n;j++){            
            if(i!=j&&i!=n-j-i&&j!=n-j-i&&n-j-i>0&&i<j&&j<n-i-j){
                int k = n-j-i;
                if(j%10 == 2 || j/10%10 == 2 || j/100%10 == 2 || j%10 == 4 || j/10%10 == 4 || j/100%10 == 4)continue;  
                if(k%10 == 2 || k/10%10 == 2 || k/100%10 == 2 || k%10 == 4 || k/10%10 == 4 || k/100%10 == 4){
                    continue;
                }     
                else{
                    //cout << i << " " << j << " " << k << endl; 
                    cnt++;            
                }
            }     
            //if(cnt>1000)return 0;
        }                
    }
    cout <<cnt;
}