题目:在河两端有两排server,如今要把河两边同样的品牌型号的机器连起来。每一个电脑有个值,
每一个机器仅仅能与还有一台机器链接。而且不同的链接不交叉,如今要求链接的电脑总之最大。
分析:dp,最大公共子序列,字符串。还要加一个字符串处理。
说明:(2011-09-19 11:08)。
#include <stdio.h> #include <stdlib.h> #include <string.h> #define max( a, b ) ((a)>(b)?(a):(b)) char LeftOS[ 1001 ][ 12 ]; char RightOS[ 1001 ][ 12 ]; int LeftID[ 1001 ]; int LeftV[ 1001 ]; int RightID[ 1001 ]; int RightV[ 1001 ]; char OSList[ 1001 ][ 12 ]; int Match[ 1001 ][ 1001 ]; int Count[ 1001 ][ 1001 ]; int Number = 0; int ID( char * Data ) { for ( int i = 0 ; i < Number ; ++ i ) if ( !strcmp( OSList[ i ], Data ) ) return i; strcpy( OSList[ Number ], Data ); return Number ++; } int main() { int t,n,m; char City[ 12 ]; while ( ~scanf("%d",&t) ) while ( t -- ) { scanf("%d",&n); for ( int i = 1 ; i <= n ; ++ i ) scanf("%s %s %d",City,LeftOS[ i ],&LeftV[ i ]); scanf("%d",&m); for ( int i = 1 ; i <= m ; ++ i ) scanf("%s %s %d",City,RightOS[ i ],&RightV[ i ]); Number = 0; for ( int i = 1 ; i <= n ; ++ i ) LeftID[ i ] = ID( LeftOS[ i ] ); for ( int i = 1 ; i <= m ; ++ i ) RightID[ i ] = ID( RightOS[ i ] ); memset( Match, 0, sizeof( Match ) ); memset( Count, 0, sizeof( Count ) ); for ( int i = 1 ; i <= n ; ++ i ) for ( int j = 1 ; j <= m ; ++ j ) { if ( Match[ i ][ j ] < Match[ i-1 ][ j ] ) { Match[ i ][ j ] = Match[ i-1 ][ j ]; Count[ i ][ j ] = Count[ i-1 ][ j ]; } if ( Match[ i ][ j ] < Match[ i ][ j-1 ] ) { Match[ i ][ j ] = Match[ i ][ j-1 ]; Count[ i ][ j ] = Count[ i ][ j-1 ]; } if ( LeftID[ i ] == RightID[ j ] && Match[ i ][ j ] < Match[ i-1 ][ j-1 ] + LeftV[ i ] + RightV[ j ] ) { Match[ i ][ j ] = Match[ i-1 ][ j-1 ] + LeftV[ i ] + RightV[ j ]; Count[ i ][ j ] = Count[ i-1 ][ j-1 ] + 1; } } printf("%d %d ",Match[ n ][ m ],Count[ n ][ m ]); } return 0; }