hdu2094

思路：最后未被击败的选手数是否为1

 1 #include <stdio.h>
 2 #include <stdlib.h>
 3 #include <string.h>
 4 
 5 int main()
 6 {
 7     int i, j, n, score[1001], number;
 8     char name[1001][100], a[1000], b[1000];
 9 
10     while( scanf( "%d", &n ) )
11     {
12         if( n == 0 )
13             break;
14 
15         memset( name, 0, sizeof(name) );
16         memset( score, 0, sizeof(score) );
17         for( i = 0, number = 0; i < n; i ++ )
18         {
19             scanf( "%s %s", a, b );
20             for( j = 0; j < number; j ++ )
21             {
22                 if( strcmp( a, name[j] ) == 0 )
23                     break;
24             }
25             if( j >= number )
26             {
27                 strcpy( name[number], a );
28                 number ++;
29             }
30             for( j = 0; j < number; j ++ )
31             {
32                 if( strcmp( b, name[j] ) == 0 )
33                 {
34                     score[j] --;
35                 }
36             }
37             if( j >= number )
38             {
39                 strcpy( name[number], b );
40                 score[number] --;
41                 number ++;
42             }
43         }
44         for( i = 0, j = 0; i < number; i ++ )
45         {
46             if( score[i] == 0 )
47                 j ++;
48         }
49         if( j == 1 )
50             printf( "Yes\n" );
51         else
52             printf( "No\n" );
53     }
54 
55     return 0;
56 }

 

posted @ 2013-02-28 20:57  hacker_hzh  阅读(145)  评论(0)    收藏  举报