delete pics to save space

2.1625.cpp

@@ -0,0 +1,68 @@
+#include<cstdio>
+#include<cstring>
+#include<algorithm>
+using namespace std;
+const int maxn=5000+5;
+const int oo=1<<30;
+char p[maxn],q[maxn];
+int sp[26],sq[26],ep[26],eq[26];
+int d[2][maxn],c[2][maxn];
+int i,j,v1,v2,t,n,m;
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif
+	int T;
+	scanf("%d",&T);
+	while(T--)
+	{
+		scanf("%s%s",p+1,q+1);
+		n=strlen(p+1);
+		m=strlen(q+1);
+		for(i=1;i<=n;i++) p[i]-='A';
+		for(i=1;i<=m;i++) q[i]-='A';
+		for(i=0;i<26;i++){sp[i]=sq[i]=oo; ep[i]=eq[i]=0;}
+		for(i=1;i<=n;i++)
+		{
+			sp[p[i]]=min(sp[p[i]],i);
+			ep[p[i]]=i;
+		}
+		for(i=1;i<=m;i++)
+		{
+			sq[q[i]]=min(sq[q[i]],i);
+			eq[q[i]]=i;
+		}
+		
+		t=0;
+		memset(c,0,sizeof(c));
+		memset(d,0,sizeof(d));
+		for(i=0;i<=n;i++)
+		{
+			for(j=0;j<=m;j++)
+			{
+				if(!i&&!j) continue;
+				
+				v1=oo,v2=oo;
+				if(i) v1=d[t^1][j]+c[t^1][j];//p
+				if(j) v2=d[t][j-1]+c[t][j-1];//q
+				d[t][j]=min(v1,v2);
+				if(i)
+				{
+					c[t][j]=c[t^1][j];
+					if(sp[p[i]]==i&&sq[p[i]]>j) c[t][j]++;
+					if(ep[p[i]]==i&&eq[p[i]]<=j) c[t][j]--;
+				}
+				else if(j)
+				{
+					c[t][j]=c[t][j-1];
+					if(sq[q[j]]==j&&sp[q[j]]>i) c[t][j]++;
+					if(eq[q[j]]==j&&ep[q[j]]<=i) c[t][j]--;
+				}
+			}
+			t^=1;
+		}
+		printf("%d\n",d[t^1][m]);
+	}
+	return 0;
+}