delete pics to save space

1.2679.cpp

@@ -0,0 +1,35 @@
+#include<cstdio>
+#include<algorithm>
+using namespace std;
+const int mod=1000000007;
+const int maxn=1005;
+const int maxm=205;
+int n,m,k;
+char A[maxn],B[maxm];
+int dp[2][maxm][maxm][2],pos=1; 
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif
+	scanf("%d%d%d",&n,&m,&k);
+	scanf("%s%s",A+1,B+1);
+	dp[0][0][0][0]=dp[1][0][0][0]=1;
+	for(int i=1;i<=n;i++,pos^=1)
+		for(int j=1;j<=m;j++)
+			for(int p=1;p<=k;p++)
+				if(A[i]==B[j])
+				{
+					dp[pos][j][p][0]=(dp[pos^1][j][p][0]+dp[pos^1][j][p][1])%mod;
+					dp[pos][j][p][1]=(dp[pos^1][j-1][p][1]+
+									  (dp[pos^1][j-1][p-1][0]+dp[pos^1][j-1][p-1][1])%mod
+									 )%mod;
+				}
+				else
+				{
+					dp[pos][j][p][0]=(dp[pos^1][j][p][0]+dp[pos^1][j][p][1])%mod;
+					dp[pos][j][p][1]=0;
+				}
+	printf("%d\n",(dp[n&1][m][k][0]+dp[n&1][m][k][1])%mod);
+	return 0;
+}