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public class ThreeIncreasing {
	public int minEaten(int a, int b, int c) {
		int b_change = max(0, b - (c - 1)); // decrease b to c-1
		b -= b_change;
		int a_change = max(0, a - (b - 1)); // decrease a to b-1
		a -= a_change;
		if(a <= 0)
			return -1;
		return a_change + b_change;
	}
}
 
 
 
public class SellingFruits {
	public int maxDays(int x, int f, int d, int p) {
		int low = 0, high = d;
		while(low < high) {
			int days = (int) (((long) low + high + 1) / 2);
			long needMoney = (long) days * x + (long) p * max(0, days - f);
			if(needMoney <= d)
				low = days;
			else
				high = days - 1;
		}
		return low;
	}
}
 
 
 
public class MappingABC2 {
	public int countStrings(int[] t) {
		final int MOD = 1000 * 1000 * 1000 + 7;
		int n = t.length;
		int MAX_VAL = 0;
		for(int i = 0; i < n; ++i) {
			MAX_VAL = max(MAX_VAL, t[i]);
			--t[i];
		}
		boolean appears[] = new boolean[MAX_VAL];
		for(int i = 0; i < MAX_VAL; ++i)
			appears[i] = false;
		for(int x : t)
			appears[x] = true;
		int answer = 0;
		for(int a0 = 0; a0 < n; ++a0)
			for(int b0 = a0 + 1; b0 < n; ++b0)
				for(int c0 = b0 + 1; c0 < n; ++c0) {
					boolean a[] = new boolean[MAX_VAL];
					boolean b[] = new boolean[MAX_VAL];
					boolean c[] = new boolean[MAX_VAL];
					for(int x = 0; x < MAX_VAL; ++x)
						a[x] = b[x] = c[x] = true;
					for(int i = 0; i < a0; ++i)
						a[t[i]] = false; // no 'A'
					b[t[a0]] = c[t[a0]] = false; // first 'A'
					for(int i = a0 + 1; i < b0; ++i)
						b[t[i]] = false; // no 'B'
					a[t[b0]] = c[t[b0]] = false; // first 'B'
					for(int i = b0 + 1; i < c0; ++i)
						c[t[i]] = false; // no 'C'
					a[t[c0]] = b[t[c0]] = false; // first 'C'
					int product = 1;
					for(int i = 0; i < MAX_VAL; ++i) if(appears[i]) {
						int ways = (a[i]?1:0) + (b[i]?1:0) + (c[i]?1:0);
						product = (int) ((long) product * ways % MOD);
					}
					answer = (answer + product) % MOD;
				}
		return answer;
	}
}

Main.java:1: error: class ThreeIncreasing is public, should be declared in a file named ThreeIncreasing.java
public class ThreeIncreasing {
       ^
Main.java:15: error: class SellingFruits is public, should be declared in a file named SellingFruits.java
public class SellingFruits {
       ^
Main.java:32: error: class MappingABC2 is public, should be declared in a file named MappingABC2.java
public class MappingABC2 {
       ^
Main.java:3: error: cannot find symbol
		int b_change = max(0, b - (c - 1)); // decrease b to c-1
		               ^
  symbol:   method max(int,int)
  location: class ThreeIncreasing
Main.java:5: error: cannot find symbol
		int a_change = max(0, a - (b - 1)); // decrease a to b-1
		               ^
  symbol:   method max(int,int)
  location: class ThreeIncreasing
Main.java:20: error: cannot find symbol
			long needMoney = (long) days * x + (long) p * max(0, days - f);
			                                              ^
  symbol:   method max(int,int)
  location: class SellingFruits
Main.java:38: error: cannot find symbol
			MAX_VAL = max(MAX_VAL, t[i]);
			          ^
  symbol:   method max(int,int)
  location: class MappingABC2
7 errors

Standard output is empty