sicily 1108 Online Selection DP

//dp//题意://n组数字，对第i组数字回答 1或0 答案与ai一样就加一分， 回答1跳到第 I1 组 回答0同理//要求给定回答的次数 k、得分m，输出过程中最多选择多少次0//初始从第0组开始回答//dp[p][l][so] 下一组数组是p，当前已选择l次，得分so的最优解#include <iostream>#include <cstdio>#include <cstring>using namespace std;int c, n, k, m;int i0[20], i1[20],a[20];int dp[25][35][35]; int main(){while( scanf( "%d",&c ) && c != 0 ){scanf( "%d%d%d",&n,&k,&m );for( int i = 0;i < n;i++ )scanf( "%d%d%d",i0+i,i1+i,a+i );memset( dp,-1,sizeof(dp) );//初始化弄错WA了很多次呢dp[0][0][0] = 0;dp[ i0[0] ][1][1] = (( a[0] == 0 ) ? 1 : dp[ i0[0] ][1][1]);dp[ i0[0] ][1][0] = (( a[0] == 0 ) ? dp[ i0[0] ][1][0]: 1);dp[ i1[0] ][1][1] = (( a[0] == 1 ) ? 0 : dp[ i1[0] ][1][1]);dp[ i1[0] ][1][0] = (( a[0] == 1 ) ? dp[ i1[0] ][1][0]: 0);for( int l = 1;l < k;l++ ){for( int p = 0;p < n;p++ ){for( int so = 0;so <= m;so++ ){if( dp[p][l][so] != -1 ){if( a[p] == 0 ){dp[ i0[p] ][l+1][so+1] = max( dp[ i0[p] ][l+1][ so+1 ] , dp[p][l][so]+1 );dp[ i1[p] ][l+1][so]   = max( dp[ i1[p]][l+1][ so ], dp[p][l][so] );}else{dp[ i0[p] ][l+1][so]   = max( dp[ i0[p] ][l+1][ so ] ,dp[p][l][so] + 1 );dp[ i1[p] ][l+1][so+1] =  max( dp[ i1[p]][l+1][ so+1], dp[p][l][so] );}}}}}int result = dp[ 0 ][k][m];for( int i = 1;i < n;i++ ){if( result < dp[i][k][m] ) result = dp[i][k][m];}if( result < 0 ) result = 0;printf( "%d %d\n",c,result );}}