Kertoma

#include <bits/stdc++.h>
 
using namespace std;
using ll = long long;
 
const int N =1e7;
const int inf = 1e9;    
 
 
ll dg(int num){
    if(num<0)return 0;
    if(num==1)return 1;
    double d = 0;
    for(int i = 2; i <= num; ++i){
        d+=log10(i);
    }
    return floor(d) + 1;
}
 
ll efdg(ll n){
    if (n < 0) 
            return 0; 
    if (n <= 1) 
        return 1; 
  
      
    double x = ((double)n * log10((double)n / M_E) + 
                log10(2.0 * M_PI * (double)n) /  
                2.0); 
 
    return (ll)floor(x) + 1;    
}
 
 
int main(){
 
    vector<int> k(10);
    ll s = 0;
    for(int&x:k)cin>>x, s+=x;
    // cout << s << "\n";
    if(s<=6){
        int x = 1;
        for(int i = 1; i <= 9; ++i){
            x *= i;
            int cur = x;
            vector<int> am(10);
            while(cur){
                am[cur%10]++;
                cur/=10;
            }
            if(am==k){
                cout << i << "\n";
                return 0;
            }
        }
        return 0;
    }
    for(ll i = 10; i <= N; ++i){
        // cout << i << ": " << cur << " " << dg(i) << "\n";
        if(efdg(i)==s){
            cout << i << "\n";
            return 0;
        }
    }
 
    // cout << floor(log10(10)) << " " << ceil(log10(10)) << "\n";
    
 
 
 
    
}

Test 1

Group: 1, 2, 3

Verdict: ACCEPTED

Test 2

Group: 1, 2, 3

Verdict: ACCEPTED

Test 3

Group: 1, 2, 3

Verdict: ACCEPTED

Test 4

Group: 1, 2, 3

Verdict: ACCEPTED

Test 5

Group: 1, 2, 3

Verdict: ACCEPTED

Test 6

Group: 1, 2, 3

Verdict: ACCEPTED

Test 7

Group: 2, 3

Verdict: ACCEPTED

Test 8

Group: 2, 3

Verdict: ACCEPTED

Test 9

Group: 2, 3

Verdict: ACCEPTED

Test 10

Group: 2, 3

Verdict: ACCEPTED

Test 11

Group: 3

Verdict: ACCEPTED

Test 12

Group: 3

Verdict: ACCEPTED

Test 13

Group: 3

Verdict: ACCEPTED

Test 14

Group: 3

Verdict: ACCEPTED

Test 15

Group: 3

Verdict: ACCEPTED

Test 16

Group: 3

Verdict: ACCEPTED