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curriculum/challenges/italian/10-coding-interview-prep/project-euler/problem-166-criss-cross.md

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+---
+id: 5900f4131000cf542c50ff25
+title: 'Problem 166: Criss Cross'
+challengeType: 5
+forumTopicId: 301800
+dashedName: problem-166-criss-cross
+---
+
+# --description--
+
+A 4x4 grid is filled with digits d, 0 ≤ d ≤ 9.
+
+It can be seen that in the grid
+
+6 3 3 0 5 0 4 3 0 7 1 4 1 2 4 5
+
+the sum of each row and each column has the value 12. Moreover the sum of each diagonal is also 12.
+
+In how many ways can you fill a 4x4 grid with the digits d, 0 ≤ d ≤ 9 so that each row, each column, and both diagonals have the same sum?
+
+# --hints--
+
+`euler166()` should return 7130034.
+
+```js
+assert.strictEqual(euler166(), 7130034);
+```
+
+# --seed--
+
+## --seed-contents--
+
+```js
+function euler166() {
+
+  return true;
+}
+
+euler166();
+```
+
+# --solutions--
+
+```js
+// solution required
+```