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分享一下自己写的递归,需要的朋友可以参考 208K 0MS C++ 460B#include <iostream> #include <string> using namespace std; string f(string s1,string s2) { if(s1.length()==1) return s1; else if(s1.length()==0) return ""; else { size_t m=s1.find(s2[0]); return f(s1.substr(0,m),s2.substr(1,m))+f(s1.substr(m+1),s2.substr(m+1))+s2[0]; } } int main() { string s1,s2,s;//s1为preorder traversal s2为inorder traversal while(cin>>s1>>s2) { s=f(s2,s1); cout<<s<<endl; } return 0; } 递归的思路是拿给的范例自己画了一下,运行范例OK就提交了,结果AC Followed by:
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