其实就是字符串

include<bits/stdc++.h>

using namespace std; int main(){

int n;
cin>>n;
getchar();
char s[1001],a[101][101];
cin.getline(s,1000);
int len=strlen(s),t=0;
int m=(len+n-1)/n;
for (int j=m-1;j>=0;j--)
  for (int i=0;i<n;i++)
    if (t<len)
      a[i][j]=s[t++];
    else
      a[i][j]=' ';
for (int i=0;i<n;i++){
	for (int j=0;j<m;j++)
	  	cout<<a[i][j];
	cout<<endl;
} 
return 0;

}