delete pics to save space

2.1025.cpp

@@ -0,0 +1,75 @@
+#include<cstdio>
+#include<cstring>
+#include<algorithm>
+//#include<conio.h>
+using namespace std;
+const int oo=1<<30;
+bool has_train[201][51][2];
+int t[51],dp[201][51];
+int n,T,i,j,m,d,ti,kase;
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif
+	while(scanf("%d",&n)==1&&n)
+	{
+		memset(has_train,0,sizeof(has_train));
+		scanf("%d",&T);
+		for(i=1;i<=n-1;i++) scanf("%d",&t[i]);
+		scanf("%d",&m);
+		for(i=0;i<m;i++)
+		{
+			scanf("%d",&d);
+			for(j=1,ti=d;j<=n&&ti<=T;ti+=t[j],j++)
+				has_train[ti][j][0]=1;
+		}
+		scanf("%d",&m);
+		for(i=0;i<m;i++)
+		{
+			scanf("%d",&d);
+			for(j=n,ti=d;j>=1&&ti<=T;ti+=t[j-1],j--)
+				has_train[ti][j][1]=1;
+		}
+		
+//		printf("right:\n");
+//		printf("      sta\\time");
+//		for(i=0;i<=T;i++) printf("%3d",i);
+//		printf("\n");
+//		for(i=1;i<=n;i++)
+//		{
+//			printf("      %d       ",i);
+//			for(j=0;j<=T;j++) printf("%s",has_train[j][i][0]?"  *":"   ");
+//			printf("\n");
+//		}
+//		printf("left :\n");
+//		printf("      sta\\time");
+//		for(i=0;i<=T;i++) printf("%3d",i);
+//		printf("\n");
+//		for(i=1;i<=n;i++)
+//		{
+//			printf("      %d       ",i);
+//			for(j=0;j<=T;j++) printf("%s",has_train[j][i][1]?"  *":"   ");
+//			printf("\n");
+//		}
+//		getch();
+		
+		for(i=1;i<=n-1;i++) dp[T][i]=oo;
+		dp[T][n]=0;
+		for(i=T-1;i>=0;i--)
+			for(j=1;j<=n;j++)
+			{
+				dp[i][j]=dp[i+1][j]+1;
+				if(j<n&&has_train[i][j][0]&&i+t[j]<=T)
+					dp[i][j]=min(dp[i][j],dp[i+t[j]][j+1]); //right
+				if(j>1&&has_train[i][j][1]&&i+t[j-1]<=T)
+					dp[i][j]=min(dp[i][j],dp[i+t[j-1]][j-1]); //left
+			}
+		
+		printf("Case Number %d: ",++kase);
+		if(dp[0][1]>=oo) printf("impossible\n");
+		else printf("%d\n",dp[0][1]);
+//		getch();
+	}
+	return 0;
+}