简单题
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
#include <iostream> #include <cstdio> #include <cstdlib> #include <cstring> using namespace std; #define maxn 2008 int n; char line[maxn]; void input() { scanf("%d", &n); for (int i = 0; i < n; i++) { char ch[3]; scanf("%s", ch); line[i] = ch[0]; } } void work() { int l = 0, r = n - 1; int ncount = 0; while (l <= r) { int a = l, b = r; while (a < b && line[a] == line[b]) a++, b--; if (line[a] > line[b]) putchar(line[r--]); else putchar(line[l++]); ncount++; if (ncount % 80 == 0) putchar('\n'); } if (ncount % 80) putchar('\n'); } int main() { //freopen("t.txt", "r", stdin); input(); work(); return 0; }