Kertoma

#include <cmath>
#include <iostream>

int countDigits(int n) {
    if (n == 0)
        return 0;

    if (n == 1)
        return 1;

    double sum = 0;

    for (int i = 2; i <= n; i++) {
        sum += std::log10(i);
    }

    return std::floor(sum) + 1;
}

int main() {
    int n = 0;

    int nums[10] = {};

    for (int i = 0; i < 10; i++) {
        int tmp;
        std::cin >> tmp;

        nums[i] = tmp;
        n += tmp;
    }

    if (n == 1) {
        if (nums[2] == 1) {
            std::cout << 2 << std::endl;
        } else {
            std::cout << 3 << std::endl;
        }
        return 0;
    } else if (n == 3) {
        if (nums[1] == 1) {
            std::cout << 5 << std::endl;
        } else {
            std::cout << 6 << std::endl;
        }
        return 0;
    }

    int i = 0;
    while (true) {
        if (countDigits(i) >= n) {
            std::cout << i << std::endl;
            break;
        }
        i++;
    }

    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: 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: TIME LIMIT EXCEEDED

Test 14

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 15

Group: 3

Verdict: TIME LIMIT EXCEEDED

Test 16

Group: 3

Verdict: TIME LIMIT EXCEEDED