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- #include <bits/stdc++.h>
- using namespace std;
- const int N=510;
- int dp[N][N];
- int main()
- {
- string a,b;
- cin>>a>>b;
- int n=a.size(),m=b.size();
- for(int i=0;i<=n;++i)
- dp[i][0]=1;
- for(int i=1;i<=n;++i){
- for(int j=1;j<=m;++j){
- if(a[i-1]==b[j-1])
- dp[i][j]=dp[i-1][j-1]+dp[i-1][j];
- else
- dp[i][j]=dp[i-1][j];
- // printf("%d ",dp[i][j]);
- }
- // printf("\n");
- }
- printf("%d",dp[n][m]);
- return 0;
- }
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