# UVa10252 - Common Permutation [Prblem link](https://onlinejudge.org/external/102/10252.pdf) ## Review ### 空字串輸入 測資有空字串,所以要用`getline(cin,str);` ## Ans ```cpp= #include <bits/stdc++.h> using namespace std; int main(){ string a,b; while(getline(cin, a)&& getline(cin, b)){ string ans=""; for(int i=0;i<a.length();i++){ for(int j=0;j<b.length();j++){ if(a[i]==b[j]){ ans+=a[i]; b.erase(b.begin()+j); break; } } } sort(ans.begin(),ans.end()); cout<<ans<<endl; } } ```
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