鎹瑕?鍒嗛挓鍐呭啓鍑轟唬鐮侊紝鎴戣瘯浜嗕竴涓嬶紝鏁村嚭鎬濊礬閮芥湁鍑犲垎閽熶簡錛屼唬鐮佸啓鍑烘潵閮藉揩涓妸灝忔椂浜嗭紝鑷涓轟篃鍐欒繃閭ｄ箞澶氬勾鐨勭▼搴忥紝涔熶笉鑷充簬閭ｄ箞寮辯垎鍚э紝闅鵑亾浼犺涓殑紲炰漢灝辮繖涔堝帀瀹籌紵
浠ｇ爜璐翠笅闈紝楂樻墜鎸囩偣錛?
1
2 /*
3 鏈変袱涓暟緇刟,b錛屽ぇ灝忛兘涓簄,鏁扮粍鍏冪礌鐨勫間換鎰忥紝鏃犲簭錛?br /> 4 瑕佹眰錛氶氳繃浜ゆ崲a,b涓殑鍏冪礌錛屼嬌鏁扮粍a鍏冪礌鐨勫拰涓庢暟緇刡鍏冪礌鐨勫拰涔嬮棿鐨勫樊鏈灝?br /> 5 */
6
7 /*
8 綆楁硶鎬濇兂灝辨槸鍏堟妸涓ゅ爢鏁版帓搴忥紝鐒跺悗緇欑粨鏋滄暟緇勫垎閰嶏紝褰撲竴杈規湁涓涓渶澶х殑鏁版椂錛?br /> 9 搴旇緇欏畠閰嶄竴涓渶灝忕殑鏁幫紝鎵浠ヤ竴嬈″彇涓や釜鏁般傚綋緇橝緇勫垎閰嶆渶澶AX鍜屾渶灝忕殑MIN鍚庯紝
10 鍐嶅湪鍓╀笅鏈垎閰嶇殑鏁伴噷鍙栧嚭鏈澶у拰鏈灝忕殑鏁板垎閰嶇粰B錛岀洿鍒板垎瀹屼負姝€?br /> 11 榪欎釜綆楁硶騫朵笉鑳戒繚璇佹渶浼樿В錛屾紜畻娉曞簲璇ヤ嬌鐢ㄥ姩鎬佽鍒掓硶錛屼互鍚庤ˉ涓婃瑙ｇ殑浠ｇ爜銆?br /> 12 */
13
14 //浠庡墿浣欑殑鏁板帢綾蟲壘鍑烘渶澶х殑閭ｄ釜銆?br /> 15 //a,b鍒嗗埆鏄暟緇勫湴鍧錛宱ffa鍜宱ffb鏄亸縐婚噺錛屾槸鍊肩粨鏋滃弬鏁般?/span>
16 int get_max(int *a, int *offa, int *b, int *offb)
17 {
18 if(*offa == 0)
19 {
20 (*offb)--;
21 return b[*offb+1];
22 }
23 else if(*offb == 0)
24 {
25 (*offa)--;
26 return a[*offa+1];
27 }
28
29 if(a[*offa] > b[*offb])
30 {
31 (*offa)--;
32 return a[*offa+1];
33 }else{
34 (*offb)--;
35 return b[*offb+1];
36 }
37 }
38
39 //綾諱技get_max,鏄彇鏈灝忕殑鏁般?br /> 40 //n鏄暟緇勫ぇ灝忋?/span>
41 int get_min(int *a, int *offa, int *b, int *offb, int n)
42 {
43 if(*offa == n)
44 {
45 (*offb)++;
46 return a[*offb-1];
47 }
48 else if(*offb == n)
49 {
50 (*offa)++;
51 return a[*offa-1];
52 }
53
54 if(a[*offa] < b[*offb])
55 {
56 (*offa)++;
57 return a[*offa-1];
58 }else{
59 (*offb)++;
60 return a[*offb-1];
61 }
62 }
63
64 //榪欎釜灝變笉瑙ｉ噴浜嗗惂
65 void swap_i(int *a, int *b)
66 {
67 int t = *a;
68 *a = *b;
69 *b = t;
70 }
71
72 //涓葷畻娉曪紝杈撳叆鏄痑錛宐涓や釜鏁扮粍鍗抽暱搴
73 //榪斿洖浜や簰鍚庝袱緇勬暟鎹拰鐨勫樊銆?br /> 74 //姣忔浠庝袱緇勬暟鎹噷鍙栨渶澶у拰鏈灝忕殑緇勫悎璧鋒潵錛屾斁鍒頒竴杈癸紝嬈″ぇ鍜屾灝忕殑鏀懼埌鍙︿竴杈?br /> 75 //瀹為檯涓婅繖涓畻娉曚笉鑳戒繚璇佹壘鍒版渶浼樿В錛屽簲璇ヤ嬌鐢ㄥ姩鎬佽鍒掓硶鏉ユ眰鏈浼樿В銆?/span>
76 int swap_x(int *a, int *b, int n)
77 {
78 int sa, sb, la, lb, *na, *nb, idx, delta, d;
79 na = new int[n];
80 nb = new int[n];
81 idx = 0;
82 delta = 0;
83 sa = sb = 0;
84 la = lb = n - 1;
85
86 sort(a, a+n);
87 sort(b, b+n);
88
89 while(idx < n-1)
90 {
91 //鍏堢粰A鍜孊涓杈瑰垎閰嶄竴涓渶澶х殑
92 na[idx] = get_max(a, &la, b, &lb);
93 nb[idx] = get_max(a, &la, b, &lb);
94 d = na[idx] - nb[idx];
95 idx++;
96 //鐒跺悗涓杈瑰垎閰嶄竴涓渶灝忕殑
97 na[idx] = get_min(a, &la, b, &lb, n);
98 nb[idx] = get_min(a, &la, b, &lb, n);
99 d += na[idx] - nb[idx];
100 idx++;
101
102 if(delta > 0 && d > 0)
103 { //A榪欒竟鎬誨拰姣擝鐨勬誨拰澶т簡錛岀劧鍚庢柊鐨勬暟鍙堟槸A榪欒竟澶э紝鍒欓渶瑕佷氦鎹?/span>
104 swap_i(na+idx, nb+idx);
105 swap_i(na+idx-1, nb+idx-1);
106 d = -d;
107 }
108 delta += d;
109 }
110
111 //n涓哄鏁幫紝鍓╀笅涓や釜鏁般?/span>
112 if(idx == n-1)
113 {
114 if(delta > 0)
115 { //A鎬誨拰澶э紝鎶婂墿涓嬫渶鍚庝竴涓皬鐨勭粰A
116 na[idx] = get_min(a, &la, b, &lb, n);
117 nb[idx] = get_max(a, &la, b, &lb);
118 }else{ //A鎬誨拰灝忥紝鎶婂墿涓嬬殑澶ф暟緇橝
119 na[idx] = get_max(a, &la, b, &lb);
120 nb[idx] = get_min(a, &la, b, &lb, n);
121 }
122 }
123
124 memcpy(a, na, n*sizeof(a[0]);
125 memcpy(b, nb, n*sizeof(b[0]);
126 delete [] na;
127 delete [] nb;
128 return delta;
129 }
2 /*
3 鏈変袱涓暟緇刟,b錛屽ぇ灝忛兘涓簄,鏁扮粍鍏冪礌鐨勫間換鎰忥紝鏃犲簭錛?br /> 4 瑕佹眰錛氶氳繃浜ゆ崲a,b涓殑鍏冪礌錛屼嬌鏁扮粍a鍏冪礌鐨勫拰涓庢暟緇刡鍏冪礌鐨勫拰涔嬮棿鐨勫樊鏈灝?br /> 5 */
6
7 /*
8 綆楁硶鎬濇兂灝辨槸鍏堟妸涓ゅ爢鏁版帓搴忥紝鐒跺悗緇欑粨鏋滄暟緇勫垎閰嶏紝褰撲竴杈規湁涓涓渶澶х殑鏁版椂錛?br /> 9 搴旇緇欏畠閰嶄竴涓渶灝忕殑鏁幫紝鎵浠ヤ竴嬈″彇涓や釜鏁般傚綋緇橝緇勫垎閰嶆渶澶AX鍜屾渶灝忕殑MIN鍚庯紝
10 鍐嶅湪鍓╀笅鏈垎閰嶇殑鏁伴噷鍙栧嚭鏈澶у拰鏈灝忕殑鏁板垎閰嶇粰B錛岀洿鍒板垎瀹屼負姝€?br /> 11 榪欎釜綆楁硶騫朵笉鑳戒繚璇佹渶浼樿В錛屾紜畻娉曞簲璇ヤ嬌鐢ㄥ姩鎬佽鍒掓硶錛屼互鍚庤ˉ涓婃瑙ｇ殑浠ｇ爜銆?br /> 12 */
13
14 //浠庡墿浣欑殑鏁板帢綾蟲壘鍑烘渶澶х殑閭ｄ釜銆?br /> 15 //a,b鍒嗗埆鏄暟緇勫湴鍧錛宱ffa鍜宱ffb鏄亸縐婚噺錛屾槸鍊肩粨鏋滃弬鏁般?/span>
16 int get_max(int *a, int *offa, int *b, int *offb)
17 {
18 if(*offa == 0)
19 {
20 (*offb)--;
21 return b[*offb+1];
22 }
23 else if(*offb == 0)
24 {
25 (*offa)--;
26 return a[*offa+1];
27 }
28
29 if(a[*offa] > b[*offb])
30 {
31 (*offa)--;
32 return a[*offa+1];
33 }else{
34 (*offb)--;
35 return b[*offb+1];
36 }
37 }
38
39 //綾諱技get_max,鏄彇鏈灝忕殑鏁般?br /> 40 //n鏄暟緇勫ぇ灝忋?/span>
41 int get_min(int *a, int *offa, int *b, int *offb, int n)
42 {
43 if(*offa == n)
44 {
45 (*offb)++;
46 return a[*offb-1];
47 }
48 else if(*offb == n)
49 {
50 (*offa)++;
51 return a[*offa-1];
52 }
53
54 if(a[*offa] < b[*offb])
55 {
56 (*offa)++;
57 return a[*offa-1];
58 }else{
59 (*offb)++;
60 return a[*offb-1];
61 }
62 }
63
64 //榪欎釜灝變笉瑙ｉ噴浜嗗惂
65 void swap_i(int *a, int *b)
66 {
67 int t = *a;
68 *a = *b;
69 *b = t;
70 }
71
72 //涓葷畻娉曪紝杈撳叆鏄痑錛宐涓や釜鏁扮粍鍗抽暱搴
73 //榪斿洖浜や簰鍚庝袱緇勬暟鎹拰鐨勫樊銆?br /> 74 //姣忔浠庝袱緇勬暟鎹噷鍙栨渶澶у拰鏈灝忕殑緇勫悎璧鋒潵錛屾斁鍒頒竴杈癸紝嬈″ぇ鍜屾灝忕殑鏀懼埌鍙︿竴杈?br /> 75 //瀹為檯涓婅繖涓畻娉曚笉鑳戒繚璇佹壘鍒版渶浼樿В錛屽簲璇ヤ嬌鐢ㄥ姩鎬佽鍒掓硶鏉ユ眰鏈浼樿В銆?/span>
76 int swap_x(int *a, int *b, int n)
77 {
78 int sa, sb, la, lb, *na, *nb, idx, delta, d;
79 na = new int[n];
80 nb = new int[n];
81 idx = 0;
82 delta = 0;
83 sa = sb = 0;
84 la = lb = n - 1;
85
86 sort(a, a+n);
87 sort(b, b+n);
88
89 while(idx < n-1)
90 {
91 //鍏堢粰A鍜孊涓杈瑰垎閰嶄竴涓渶澶х殑
92 na[idx] = get_max(a, &la, b, &lb);
93 nb[idx] = get_max(a, &la, b, &lb);
94 d = na[idx] - nb[idx];
95 idx++;
96 //鐒跺悗涓杈瑰垎閰嶄竴涓渶灝忕殑
97 na[idx] = get_min(a, &la, b, &lb, n);
98 nb[idx] = get_min(a, &la, b, &lb, n);
99 d += na[idx] - nb[idx];
100 idx++;
101
102 if(delta > 0 && d > 0)
103 { //A榪欒竟鎬誨拰姣擝鐨勬誨拰澶т簡錛岀劧鍚庢柊鐨勬暟鍙堟槸A榪欒竟澶э紝鍒欓渶瑕佷氦鎹?/span>
104 swap_i(na+idx, nb+idx);
105 swap_i(na+idx-1, nb+idx-1);
106 d = -d;
107 }
108 delta += d;
109 }
110
111 //n涓哄鏁幫紝鍓╀笅涓や釜鏁般?/span>
112 if(idx == n-1)
113 {
114 if(delta > 0)
115 { //A鎬誨拰澶э紝鎶婂墿涓嬫渶鍚庝竴涓皬鐨勭粰A
116 na[idx] = get_min(a, &la, b, &lb, n);
117 nb[idx] = get_max(a, &la, b, &lb);
118 }else{ //A鎬誨拰灝忥紝鎶婂墿涓嬬殑澶ф暟緇橝
119 na[idx] = get_max(a, &la, b, &lb);
120 nb[idx] = get_min(a, &la, b, &lb, n);
121 }
122 }
123
124 memcpy(a, na, n*sizeof(a[0]);
125 memcpy(b, nb, n*sizeof(b[0]);
126 delete [] na;
127 delete [] nb;
128 return delta;
129 }
nullpointer 2012-05-31 09:17 鍙戣〃璇勮
]]>nullpointer 2012-03-21 14:04 鍙戣〃璇勮
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