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虽然是个水题,但是花了老长时间,终于做出来了,晒一晒#include<iostream>
#include<cstring>
using namespace std;
int main(){
int n, i, j, t, r, length;
char str[200];
char a[100][20];
while(cin>>n){
if(n==0)
break;
cin >> str;
length = strlen(str);
r = length/n;
t=0;
for(i=0;i<r;i++)
for(j=0;j<n;j++){
if(i%2==0)
a[i][j] = str[t];
if(i%2!=0)
a[i][n-1-j] = str[t];
t++;
}
for(i=0;i<n;i++)
for(j=0;j<r;j++)
cout << a[j][i];
cout << endl;
}
return 0;
}
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