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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[][] interval, outside;
int GLOBAL_N;
boolean ok(int i, int j) {
	return 0 <= i && i <= j && j < GLOBAL_N;
}
int f_interval(int i, int j) {
	return ok(i, j) ? interval[i][j] : 1;
}
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;
	interval = new int[n][n];
	outside = new int[n][n];
	for (int i = n - 1; i >= 0; --i)
		for (int j = i; j < n; ++j) {
			interval[i][j] = add(f_interval(i + 1, j), f_interval(i, j - 1));
			if (s.charAt(i) != s.charAt(j))
				interval[i][j] = subtract(interval[i][j], f_interval(i + 1, j - 1));
		}
	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] = add(ans[i], f_outside(i - 1, i + 1));
		for (int j = i + 1; j < n; ++j)
			if (s.charAt(i) == s.charAt(j)) {
				int tmp = multiply(f_interval(i + 1, j - 1), f_outside(i - 1, j + 1));
				ans[i] = add(ans[i], tmp);
				ans[j] = add(ans[j], tmp);
			}
	}
	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
final int mod = 1000 * 1000 * 1000 + 7;
      ^
Main.java:2: error: class, interface, or enum expected
int add(int a, int b) { return (a + b) % mod; }
^
Main.java:2: error: class, interface, or enum expected
int add(int a, int b) { return (a + b) % mod; }
                                              ^
Main.java:3: error: class, interface, or enum expected
int subtract(int a, int b) { return (a + mod - b) % mod; }
                                                         ^
Main.java:4: error: class, interface, or enum expected
int multiply(int a, int b) { return (int) ((long) a * b % mod); }
                                                                ^
Main.java:6: error: class, interface, or enum expected
int GLOBAL_N;
^
Main.java:7: error: class, interface, or enum expected
boolean ok(int i, int j) {
^
Main.java:9: error: class, interface, or enum expected
}
^
Main.java:12: error: class, interface, or enum expected
}
^
Main.java:15: error: class, interface, or enum expected
}
^
Main.java:16: error: class, interface, or enum expected
public int solve(String s) {
       ^
Main.java:18: error: class, interface, or enum expected
	GLOBAL_N = n;
	^
Main.java:19: error: class, interface, or enum expected
	interval = new int[n][n];
	^
Main.java:20: error: class, interface, or enum expected
	outside = new int[n][n];
	^
Main.java:21: error: class, interface, or enum expected
	for (int i = n - 1; i >= 0; --i)
	^
Main.java:21: error: class, interface, or enum expected
	for (int i = n - 1; i >= 0; --i)
	                    ^
Main.java:21: error: class, interface, or enum expected
	for (int i = n - 1; i >= 0; --i)
	                            ^
Main.java:22: error: class, interface, or enum expected
		for (int j = i; j < n; ++j) {
		                ^
Main.java:22: error: class, interface, or enum expected
		for (int j = i; j < n; ++j) {
		                       ^
Main.java:24: error: class, interface, or enum expected
			if (s.charAt(i) != s.charAt(j))
			^
Main.java:26: error: class, interface, or enum expected
		}
		^
Main.java:27: error: class, interface, or enum expected
	for (int i = 0; i < n; ++i)
	                ^
Main.java:27: error: class, interface, or enum expected
	for (int i = 0; i < n; ++i)
	                       ^
Main.java:28: error: class, interface, or enum expected
		for (int j = n - 1; j > i; --j) {
		                    ^
Main.java:28: error: class, interface, or enum expected
		for (int j = n - 1; j > i; --j) {
		                           ^
Main.java:30: error: class, interface, or enum expected
			if (s.charAt(i) != s.charAt(j))
			^
Main.java:32: error: class, interface, or enum expected
		}
		^
Main.java:35: error: class, interface, or enum expected
	for (int i = 0; i < n; ++i) {
	^
Main.java:35: error: class, interface, or enum expected
	for (int i = 0; i < n; ++i) {
	                ^
Main.java:35: error: class, interface, or enum expected
	for (int i = 0; i < n; ++i) {
	                       ^
Main.java:37: error: class, interface, or enum expected
		for (int j = i + 1; j < n; ++j)
		^
Main.java:37: error: class, interface, or enum expected
		for (int j = i + 1; j < n; ++j)
		                    ^
Main.java:37: error: class, interface, or enum expected
		for (int j = i + 1; j < n; ++j)
		                           ^
Main.java:40: error: class, interface, or enum expected
				ans[i] = add(ans[i], tmp);
				^
Main.java:41: error: class, interface, or enum expected
				ans[j] = add(ans[j], tmp);
				^
Main.java:42: error: class, interface, or enum expected
			}
			^
Main.java:45: error: class, interface, or enum expected
	int X = 0;
	^
Main.java:46: error: class, interface, or enum expected
	for(int i = 0; i < n; ++i)
	^
Main.java:46: error: class, interface, or enum expected
	for(int i = 0; i < n; ++i)
	               ^
Main.java:46: error: class, interface, or enum expected
	for(int i = 0; i < n; ++i)
	                      ^
Main.java:48: error: class, interface, or enum expected
	return X;
	^
Main.java:49: error: class, interface, or enum expected
}
^
42 errors

Standard output is empty