7# include <stdio.h>
 8
 9# define N 110
10# define MAX 342289
11
12int b[ N ][ N ],p[ N ][ N ];
13int m[ N ];
14
15int main()
16{
17    int n;
18    int min_b, max_b;
19    int sum_p, min_p;
20    double max;
21    int T; scanf( "%d", &T );
22    while ( T -- )
23    {
24        max_b = 0; min_b = MAX;
25        scanf("%d",&n);
26        for( int i = 0; i < n; ++ i)
27        {
28            scanf( "%d", &m[i] );
29            for( int j = 0; j < m[ i ]; ++ j )
30            {
31                scanf( "%d %d", &b[ i ][ j ], &p[ i ][ j ] );
32                if ( max_b < b[ i ][ j ] ) max_b = b[ i ][ j ];
33                if ( min_b > b[ i ][ j ] ) min_b = b[ i ][ j ];
34            }
35        }
36        max = 0.00;
37        for( int i = min_b; i <= max_b; ++ i)
38        {
39            sum_p = 0;
40            for( int j = 0; j < n; ++ j)
41            {
42                min_p = MAX;
43                for( int k = 0; k < m[ j ]; ++ k )
44                {
45                    if( b[ j ][ k ] >= i && p[ j ][ k ] < min_p )
46                    {
47                        min_p = p[ j ][ k ];
48                    }
49                }
50                sum_p += min_p;
51            }
52            if( (double)i / (double)sum_p > max ) 
53            {
54                max = (double)i / (double)sum_p;
55            }
56        }
57        printf( "%.3lf\n", max );
58    }
59    return 0;
60}

• Re:这份代码我感觉是错的，为什么ac了呢 (1584) newpanda 2010-03-30 22:48:38
  • Re:这份代码我感觉是错的，为什么ac了呢 (50) oneaon 2010-08-01 21:19:16
• 没错 (202) Nstd 2010-11-29 19:36:20