#include <iostream>
using namespace std;
 
const int MAX_LENGTH = 10;
const int TEN = 10;
 
int main() {
	int n;
	cin >> n;
	int freq[TEN] = {0};
	for (int i = 1; i <= n; ++i) {
		int no;
		cin >> no;
		while (no) {
			++freq[no % TEN];
			no /= TEN;
		}
	}
	int counter1 = 0;
	for (int i = 0; i < TEN; ++i) {
		if (freq[i] == 0) {
			++counter1;
		}
	}
	for (int i = 1; i <= n; ++i) {
		int no;
		cin >> no;
		while (no) {
			if (freq[no % TEN] != 0) {
				--freq[no % TEN];
			}
			no /= TEN;
		}
	}	
	int countPairs = 0;
	for (int i = 0; i < TEN; ++i) {
		if (freq[i] == 0) {
			++countPairs;
		}
	}
	cout << countPairs - counter1;
	return 0;
}//

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

5
1 1 1 2 2
2 2 2 1 1 
→ 0

5
1 2 3 4 5 
6 7 8 9 10
→ 1

5
5 5 5 5 5
5 5 5 5 5
→ 1

6
88 88 88 99 99 99
99 99 99 88 88 88
→ 2
Bustamante Thiago
9:27 PM
1
1
1 -> 1

1
10
10 -> 2

2
1 100
100 1 -> 2

5
1 2 3 4 5
5 4 3 2 1 -> 5

5
2 2 2 2 2
2 2 2 2 2 -> 1

10
1 100 100 1 1 100 100 1 100 1
100 1 100 1 100 1 100 1 100 1 -> 2

1
1
2 -> 0

2
1 100
99 2 -> 0

5
2 4 6 8 10
1 3 5 7 9 -> 1

5
2 2 2 2 2
2 3 3 3 3 -> 0

10
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20 -> 8

5
45 45 45 45 45
54 54 54 54 54 -> 2

3
99 888 77      
99 80 77       -> 2

5
99 88 77 99 100
99 80 77 99 100
Date ieșire:
-> 3