Codeforces round #242 (Div. 2) A. Squats

Pasha has too hamsters and he makes them work out. Today,NHamsters (NIs even) came to work out. The hamsters lined up and each hamster either sat down or stood up.

For another exercise, Pasha needs exactly hamsters to stand up and the other hamsters to sit down. in one minute, Pasha can make some hamster ether sit down or stand up. how many minutes will he need to get what he wants if he acts optimally well?

Input

The first line contains integerN(2? ≤?N? ≤? 200;NIs even). The next line containsNCharacters without spaces. These characters describe the hamsters' position:I-Th character equals 'x', ifI-Th hamster in the row is standing, and 'x', if he is sitting.

Output

In the first line, print a single integer-the minimum required number of minutes. in the second line, print a string that describes the hamsters 'position after Pasha makes the required changes. if there are multiple optimal positions, print any of them.

Sample test (s) Input

4xxXx

Output

1XxXx

Input

2XX

Output

1xX

Input

6xXXxXx

Output

0xXXxXx

Change X to n/2

#include <iostream>#include <cstdio>#include <cstring>#include <algorithm>#include <cmath>using namespace std;const int maxn = 300;char str[maxn];int main() {int n;scanf("%d", &n);scanf("%s", str);int ans = 0;for (int i = 0; i < n; i++)if (str[i] == 'X')ans++;int flag = ans > (n/2) ? 1 : 0;ans = abs(ans - (n/2));printf("%d\n", ans);int cnt = 0;for (int i = 0; i < n; i++) {if (cnt >= ans || ans == 0)break;if (flag && str[i] == 'X') {str[i] = 'x';ans--;}else if (!flag && str[i] == 'x') {str[i] = 'X';cnt++;}}printf("%s\n", str);return 0;}

Codeforces round #242 (Div. 2) A. Squats