language: Java (sun-jdk-1.7.0_10)
date: 873 days 23 hours ago
link:
visibility: public 
1

import java.util.*;public class Main{public static void main(String[]r){Scanner s=new Scanner(System.in);final Map g=new HashMap();while(s.hasNext()){g.put(s.nextInt(),s.nextInt());}for(int a:new HashSet<Integer>(g.keySet()){{removeAll(g.values());}}){while(g.containsKey(a)){System.out.print(a+"->");a=(Integer)g.get(a);}System.out.println(a);}}}
Note: Main.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
  • upload with new input
  • # 1:   hide   clone   input   873 days 23 hours ago

    result: Success     time: 0.09s    memory: 213440 kB     returned value: 0 

    784 955
405 185
723 726
188 531
522 775
716 514
731 489
380 861
514 110
921 468
674 793
489 364
755 247
90 716
4 470
315 193
257 21
793 673
783 481
468 315
745 504
726 606
592 968
401 195
99 368
231 76
110 859
412 142
193 674
504 99
219 755
861 522
368 412
773 188
859 976
21 212
185 257
976 104
955 381
775 565
350 401
92 723
212 783
847 727
477 4
142 921
258 942
238 745
470 350
247 92
119 592
968 833
673 405
263 90
481 269
381 231
195 258
76 644
942 263
821 238
565 773
364 847
104 119
644 380
833 731
531 219
    821->238->745->504->99->368->412->142->921->468->315->193->674->793->673->405->185->257->21->212->783->481->269
784->955->381->231->76->644->380->861->522->775->565->773->188->531->219->755->247->92->723->726->606
477->4->470->350->401->195->258->942->263->90->716->514->110->859->976->104->119->592->968->833->731->489->364->847->727