1475번: 방 번호

#include <iostream>

#include <string.h>

using namespace std;

int main()

{

char N[8];

int big, num[10];

memset(num, 0, sizeof(num));

cin >> N;

for (int i = 0; N[i] != '\0'; ++i)

++num[(int)(N[i]-48)];

num[6] = (num[6] + num[9] + 1) / 2;

big = num[0];

for (int i = 1; i < 9; ++i)

big = (big < num[i]) ? num[i] : big;

cout << big;

}