从1-9四个数字中选出4个任意排列为2组，使其相加为10000，且每组数字中不能有能重复的数字
\u95ee;1\u81f39\uff0c9\u4e2a\u6570\uff0c\u4ee54\u4e2a\u6570\u5b57\u4efb\u610f\u6392\u5217\u7ec4\u5408\uff0c\u4f46\u4e0d\u80fd\u91cd\u590d\uff0c\u4e00\u5171\u53ef\u6392\u5217\u591a\u5c11\u7ec4A94=3024\u79cd
\u9ad8\u4e2d\u7684\u6392\u5217\u9898\uff0c\u5c31\u662f9*8*7*6=3024\u79cd
7359+2641=10000按这个思路，可自己试着写出其他组合。
4321+5679=10000 挺多种的，只要个位数相加为10，其它位数相加为9即可
绛旓細2 5 6 8 鏈澶鏁8652/4=2163娆″ぇ鏁8625/5=1725
绛旓細闅忔剰鍙4涓暟瀛鐨勫彇娉曟湁锛欰(10,4)=10*9*8*7绉 涓嶈兘鎺掑垪鎴愪竴涓洓浣嶆暟鐨勬儏鍐靛氨鏄涓涓槸0锛屾湁A(9,3)=9*8*7绉 鎵浠ヨ兘鎺掑垪鎴愪竴涓洓浣嶆暟鐨勬鐜囨槸锛1-9*8*7/(10*9*8*7)=9/10
绛旓細鍏堣鏄庣櫧锛1鍒9锛岄偅鍑涓暟瀛涔嬪拰绛変簬9 1.2+8.7=9.9 3.6+6.3=9.9 4.5+5.4=9.9 濡傛灉鍘绘帀鐩稿悓鐨勫氨鍙墿涓 1.2+8.7=9.9
绛旓細A:C52 *C42*A44 = 10*6*4*3*2 = 1440 B:A44+C51*C43*A44+C52*C42*A44 = 4*3*2 + 5*4*4*3*2 + 5*2*2*3*4*3*2 = 1944
绛旓細瀵逛簬杩欓亾棰樼洰锛屽彲浠ュ垎鎯呭喌璁ㄨ銆傚洓浣嶆暟鏄敱1~9鐨勬暟瀛楃粍鎴愮殑锛屽洜姝234567890涓彧瑕閫夊嚭浠绘剰鍥涗釜鏁板瓧鍗冲彲鍑戞垚涓涓洓浣嶆暟銆傛儏鍐典竴锛4涓暟涓娌℃湁0 杩欑鎯呭喌涓嬶紝闇瑕佸幓鎺23456789涓殑涓涓暟鏉ユ瀯鎴愬洓浣嶆暟銆傚叡鏈9绉嶉夋硶銆傛儏鍐典簩锛歘
绛旓細濡傛灉鏁板瓧鍏佽閲嶅锛屾湁9*9*9*9=6561绉 濡傛灉鏁板瓧涓嶅厑璁搁噸澶嶏紝鏈塁(9,4)A(4,4)=126*4!=3024绉 鏈涢噰绾
绛旓細浠0~9閫4涓暟缁勬垚涓嶉噸澶嶇殑4浣嶆暟锛岃繖涓4浣嶆暟鑳借99鏁撮櫎鐨勬鐜囨槸 1/42 ..鐪嬮敊浜 浠1~9閫4涓暟缁勬垚涓嶉噸澶嶇殑4浣嶆暟锛岃繖涓4浣嶆暟鑳借99鏁撮櫎鐨勬鐜囬渶瑕侀噸鏂拌冭檻绠楁硶
绛旓細鏃㈢劧杩欎釜鏁板ぇ浜4000灏忎簬8000涓旇兘琚5鏁撮櫎鐨勬暟锛岄偅涔堝熬鏁板繀椤绘槸5锛屼笖绗涓涓暟鍙兘鏄4銆6鎴7锛岀浜屼綅鍜岀涓変綅鏁板彲浠ヤ粠鍏朵粬鐨鏁板瓧涓换鎰忛锛5鍜岀涓浣嶆暟瀛楀凡閫夛紝鎵浠ヨ繕鍓7涓暟瀛锛夈傜畻娉曪細3*7*6=126 绗竴浣嶆湁3涓彲閫夋暟瀛锛岀浜屼负鏈7涓紝绗笁浣嶆湁6涓
绛旓細鎺掑垪涓庣粍鍚 鍥犱负鎶藉嚭鏉ョ殑鍥涗釜鏁板瓧涓嶅垎椤哄簭 鍗筹細 1锛2锛3锛4鍜4锛3锛2锛1鏄涓涓粍鍚 鎵浠ヨ繖涓粍鍚堥棶棰橈紝灏卞儚涔板僵绁ㄤ竴鏍 鏁板涓婄粍鍚堣绠楁柟娉曟槸 C(4/9)=9!/4!(9-4)!=9*8*7*6/4*3*2*1=126 杩欎釜鍏紡鏄彲浠ヨ瘉鏄庣殑锛岄珮涓鏈氨鏈夈傘傘
绛旓細include <stdio.h>#include <stdlib.h>char array[] = "12356789";#define N 8#define M 4int queue[N] = {0};int top = 0;int flag[M] = {0};char s[4]={0};FILE *p;p = fopen("1.txt","w");void perm(int s1, int n){ int i; if (s1 > n) { ...
