Kertoma

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
ll sum,a[10];
ld pre[300010];
bool comp(ll x){
	ll b[10];
	memset(b,0,sizeof(b));
	while(x){
		b[x%10]++;
		x/=10;
	}
	for(ll i=0;i<10;i++){
		if(a[i]!=b[i])return false;
	}
	return true;
}
void solveP(){
	ll x=1,timer=0;
	while(!comp(x)){
		timer++;
		x*=timer;
	}
	cout<<timer;
	return;
}
void solve(){
	ll i=1;
	while(floor(pre[i])<sum){
		pre[i]=pre[i-1]+log10(i);
		if(floor(pre[i])==sum){
			cout<<i;
			return;
		}
		i++;
	}
	cout<<i-1;
}
int main(){
	for(int i=0;i<10;i++){
		cin>>a[i];
		sum+=a[i];
	}
	if(sum<=15){
		solveP();
	}
	else solve();
	return 0;
}

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: WRONG ANSWER

Test 6

Group: 1, 2, 3

Verdict: WRONG ANSWER

Test 7

Group: 2, 3

Verdict: WRONG ANSWER

Test 8

Group: 2, 3

Verdict: WRONG ANSWER

Test 9

Group: 2, 3

Verdict: WRONG ANSWER

Test 10

Group: 2, 3

Verdict: WRONG ANSWER

Test 11

Group: 3

Verdict: WRONG ANSWER

Test 12

Group: 3

Verdict: WRONG ANSWER

Test 13

Group: 3

Verdict: WRONG ANSWER

Test 14

Group: 3

Verdict: WRONG ANSWER

Test 15

Group: 3

Verdict: WRONG ANSWER

Test 16

Group: 3

Verdict: WRONG ANSWER