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public int minRounds(int a, int b, int c) {
	int ans = 0;
	while(b < c) {
		++ans;
		b += b - a;
	}
	return ans;
}
 
 
 
int getScore(int len) {
	return len * min(len, 26);
}
String getString(int len) {
	String s = "";
	for(int i = 0; i < len; ++i)
		s += (char) ('a' + i % 26);
	return s;
}
public String[] findAny(int K) {
	List<Integer> taken = new ArrayList<Integer>();
	while(K > 0) {
		int n = 1;
		while (getScore(n + 1) <= K && n + 1 <= 50)
			++n;
		K -= getScore(n);
		taken.add(n);
	}
	String[] ans = new String[taken.size()];
	for(int i = 0; i < taken.size(); ++i)
		ans[i] = getString(taken.get(i));
	System.out.println(ans.length);
	return ans;
}
 
 
 
final int mod = 1000 * 1000 * 1000 + 7;
int add(int a, int b) { return (a + b) % mod; }
int subtract(int a, int b) { return (a + mod - b) % mod; }
int multiply(int a, int b) { return (int) ((long) a * b % mod); }
int[][] outside;
int GLOBAL_N;
boolean ok(int i, int j) {
	return 0 <= i && i <= j && j < GLOBAL_N;
}
int f_outside(int i, int j) {
	return ok(i, j) ? outside[i][j] : 1;
}
public int solve(String s) {
	int n = s.length();
	GLOBAL_N = n;
	outside = new int[n][n];
	for (int i = 0; i < n; ++i)
		for (int j = n - 1; j > i; --j) {
			outside[i][j] = add(f_outside(i - 1, j), f_outside(i, j + 1));
			if (s.charAt(i) != s.charAt(j))
				outside[i][j] = subtract(outside[i][j], f_outside(i - 1, j + 1));
		}
 
	int[] ans = new int[n];
	for (int i = 0; i < n; ++i)
		ans[i] = f_outside(i - 1, i + 1);
	write(ans);
	int X = 0;
	for(int i = 0; i < n; ++i)
		X ^= multiply(ans[i], i + 1);
	return X;
}

Main.java:1: error: class, interface, or enum expected
public int minRounds(int a, int b, int c) {
       ^
Main.java:3: error: class, interface, or enum expected
	while(b < c) {
	^
Main.java:5: error: class, interface, or enum expected
		b += b - a;
		^
Main.java:6: error: class, interface, or enum expected
	}
	^
Main.java:8: error: class, interface, or enum expected
}
^
Main.java:14: error: class, interface, or enum expected
}
^
Main.java:17: error: class, interface, or enum expected
	for(int i = 0; i < len; ++i)
	^
Main.java:17: error: class, interface, or enum expected
	for(int i = 0; i < len; ++i)
	               ^
Main.java:17: error: class, interface, or enum expected
	for(int i = 0; i < len; ++i)
	                        ^
Main.java:19: error: class, interface, or enum expected
	return s;
	^
Main.java:20: error: class, interface, or enum expected
}
^
Main.java:21: error: class, interface, or enum expected
public String[] findAny(int K) {
       ^
Main.java:23: error: class, interface, or enum expected
	while(K > 0) {
	^
Main.java:25: error: class, interface, or enum expected
		while (getScore(n + 1) <= K && n + 1 <= 50)
		^
Main.java:27: error: class, interface, or enum expected
		K -= getScore(n);
		^
Main.java:28: error: class, interface, or enum expected
		taken.add(n);
		^
Main.java:29: error: class, interface, or enum expected
	}
	^
Main.java:31: error: class, interface, or enum expected
	for(int i = 0; i < taken.size(); ++i)
	^
Main.java:31: error: class, interface, or enum expected
	for(int i = 0; i < taken.size(); ++i)
	               ^
Main.java:31: error: class, interface, or enum expected
	for(int i = 0; i < taken.size(); ++i)
	                                 ^
Main.java:33: error: class, interface, or enum expected
	System.out.println(ans.length);
	^
Main.java:34: error: class, interface, or enum expected
	return ans;
	^
Main.java:35: error: class, interface, or enum expected
}
^
Main.java:39: error: class, interface, or enum expected
final int mod = 1000 * 1000 * 1000 + 7;
      ^
Main.java:40: error: class, interface, or enum expected
int add(int a, int b) { return (a + b) % mod; }
^
Main.java:40: error: class, interface, or enum expected
int add(int a, int b) { return (a + b) % mod; }
                                              ^
Main.java:41: error: class, interface, or enum expected
int subtract(int a, int b) { return (a + mod - b) % mod; }
                                                         ^
Main.java:42: error: class, interface, or enum expected
int multiply(int a, int b) { return (int) ((long) a * b % mod); }
                                                                ^
Main.java:44: error: class, interface, or enum expected
int GLOBAL_N;
^
Main.java:45: error: class, interface, or enum expected
boolean ok(int i, int j) {
^
Main.java:47: error: class, interface, or enum expected
}
^
Main.java:50: error: class, interface, or enum expected
}
^
Main.java:51: error: class, interface, or enum expected
public int solve(String s) {
       ^
Main.java:53: error: class, interface, or enum expected
	GLOBAL_N = n;
	^
Main.java:54: error: class, interface, or enum expected
	outside = new int[n][n];
	^
Main.java:55: error: class, interface, or enum expected
	for (int i = 0; i < n; ++i)
	^
Main.java:55: error: class, interface, or enum expected
	for (int i = 0; i < n; ++i)
	                ^
Main.java:55: error: class, interface, or enum expected
	for (int i = 0; i < n; ++i)
	                       ^
Main.java:56: error: class, interface, or enum expected
		for (int j = n - 1; j > i; --j) {
		                    ^
Main.java:56: error: class, interface, or enum expected
		for (int j = n - 1; j > i; --j) {
		                           ^
Main.java:58: error: class, interface, or enum expected
			if (s.charAt(i) != s.charAt(j))
			^
Main.java:60: error: class, interface, or enum expected
		}
		^
Main.java:63: error: class, interface, or enum expected
	for (int i = 0; i < n; ++i)
	^
Main.java:63: error: class, interface, or enum expected
	for (int i = 0; i < n; ++i)
	                ^
Main.java:63: error: class, interface, or enum expected
	for (int i = 0; i < n; ++i)
	                       ^
Main.java:65: error: class, interface, or enum expected
	write(ans);
	^
Main.java:66: error: class, interface, or enum expected
	int X = 0;
	^
Main.java:67: error: class, interface, or enum expected
	for(int i = 0; i < n; ++i)
	^
Main.java:67: error: class, interface, or enum expected
	for(int i = 0; i < n; ++i)
	               ^
Main.java:67: error: class, interface, or enum expected
	for(int i = 0; i < n; ++i)
	                      ^
Main.java:69: error: class, interface, or enum expected
	return X;
	^
Main.java:70: error: class, interface, or enum expected
}
^
52 errors

Standard output is empty