{"trustable":false,"sections":[{"title":"","value":{"format":"MD","content":"![poj2785.png](https://i.loli.net/2019/08/18/4SEsUIT63trXluj.png)"}},{"title":"Input","value":{"format":"MD","content":"![屏幕快照 2019-08-18 21.12.26.png](https://i.loli.net/2019/08/18/GD7zlAifqwWjSdX.png)"}},{"title":"Output","value":{"format":"MD","content":"输出不同组合的个数。"}},{"title":"Sample Input","value":{"format":"MD","content":"6\n-45 22 42 -16\n-41 -27 56 30\n-36 53 -37 77\n-36 30 -75 -46\n26 -38 -10 62\n-32 -54 -6 45"}},{"title":"Sample Output","value":{"format":"MD","content":"5"}},{"title":"Hint","value":{"format":"MD","content":"分别有{-45, -27, 42, 30}, {26, 30, -10, -46}, {-32, 22, 56, -46},{-32, 30, -75, 77}, {-32, -54, 56, 30}这五种组合"}}]}