{"trustable":false,"sections":[{"title":"","value":{"format":"HTML","content":"\n \u003cdiv class\u003d\"ptx\"\u003e\n 给出一个数n,求他的数根。一个数的数根是不断对各个位数求和,直到最后结果是个位数。例如1234,1+2+3+4\u003d10,1+0\u003d1;则1就是1234的数根。\n\n \u003c/div\u003e"}},{"title":"Input","value":{"format":"HTML","content":"\n \u003cdiv class\u003d\"ptx\" lang\u003d\"en-US\"\u003e\n 多组输入,输入0表示输入结束\n \u003c/div\u003e"}},{"title":"Output","value":{"format":"HTML","content":"\n \u003cdiv class\u003d\"ptx\" lang\u003d\"en-US\"\u003e\n 对于每组输入输出他的数根\n \u003c/div\u003e"}},{"title":"Sample Input","value":{"format":"HTML","content":"\u003cpre class\u003d\"sio\"\u003e24\n39\n0\u003c/pre\u003e"}},{"title":"Sample Output","value":{"format":"HTML","content":"\u003cpre\u003e\n6\n3\n\u003c/pre\u003e"}}]}