# CSU 1354 Distinct subsequences to find different sub-sequences and DP

Source: Internet
Author: User

Test instructions

Given a long integer

All different sub-sequences and.

Ideas:

Dp[i] denotes the and of the sequence ending with the i number

Num[i] Indicates the number of sequences ending with an I number

`Import Java.io.printwriter;import java.util.arraylist;import Java.util.arrays;import Java.util.Collections;import Java.util.comparator;import Java.util.iterator;import Java.util.linkedlist;import Java.util.PriorityQueue;import Java.util.scanner;import Java.util.treeset;import Java.util.queue;public class Main {static int mod = 1000000007;static int N = 100010;long[] dp = new LONG[10], num = new LONG[10]; String s;void work () {int T = Cin.nextint (), while (t--> 0) {s = Cin.next (), int len = S.length (); for (int i = 0; i < 1 0; i++) Dp[i] = Num[i] = 0;for (int i = 0; i < len; i++) {int x = S.charat (i)-' 0 '; Long sum = 0, n = 0;for (int j = 0; J < 1 0; J + +) {sum + = Dp[j];n + num[j];} if (x>0) n++;DP [x] = Sum*10%mod + n*x%mod;num[x] = n%mod;} Long ans = 0;for (int i = 0; i < i++) ans = (ans + dp[i])%mod;out.println (ANS);}} Main () {cin = new Scanner (system.in); out = new PrintWriter (System.out);} public static void Main (string[] args) {main E = new main (); E.work (); Out.close ();} Public ScanneR cin;public static printwriter out;} `

CSU 1354 Distinct subsequences to find different sub-sequences and DP

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