BOJ2875

BOJ2875.java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class BOJ2875 {

	public static void main(String[] args) throws IOException{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String str[] = br.readLine().split(" ");
		int n = Integer.parseInt(str[0]);
		int m = Integer.parseInt(str[1]);
		int k = Integer.parseInt(str[2]);
		int result = 0;

		for(int i = 0; i <= k; i++) {
			if(0 <= m-k+i && 0 <= n-i && 2*(m-k+i) <= n-i) {
				result = Math.max(result, m-k+i);
			}
			
			if(0 <= m-k+i && 0 <= n-i && (n-i)/2 <= m-k+i) {
				result = Math.max(result, (n-i)/2);
			}
		}
		
		System.out.println(result);
	}

}