Minimum Number of Operations to Move All Balls to Each Box LeetCode solution in Java

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class Solution {
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  public int[] minOperations(String boxes) {
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    int n = boxes.length();
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    int[] ans = new int[n];
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    for (int i = 0; i < n; i++) {
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      int t = 0;
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      for (int j = 0; j < n; j++) {
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        char c = boxes.charAt(j);
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        if (c == '1') t += Math.abs(i - j);
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      }
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      ans[i] = t;
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    }
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    return ans;
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  }
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}