题目链接 https://hihocoder.com/contest/hiho10/problem/1
给出先序 中序 求 后序
#include <bits/stdc++.h> using namespace std; const int N = 100; char a[N], b[N]; void divide(int sa,int ea,int sb,int eb) { if(sa > ea || sb > eb) return ; int tmp = -1; for(int i=sb; i<=eb; i++) if(a[sa] == b[i]) { tmp = i; break; } int la = tmp - sb; // 递归左子树 divide(sa+1, sa+la, sb, tmp-1); // 递归右子树 divide(sa+la+1, ea, tmp+1, eb); cout << a[sa]; } int main() { freopen("in.txt", "r", stdin); scanf("%s %s", a, b); int len = strlen(a); divide(0, len-1, 0, len-1); return 0; }