UVa 400

一开始没怎么看懂题目，原来就是M字符就是这一列的宽度为M个字符，包括空格。

#include<iostream>
#include<algorithm>
#include<string>
using namespace std;

int main()
{
    string filename[110];
    int n;
    while (cin >> n)
    {
        int cols, rows;
        int M = 0;
        for (int i = 0; i < n; i++)
        {
            cin >> filename[i];
            M = max(M, (int)filename[i].length());
        }
        cols = (60 - M) / (M + 2) + 1;
        rows = (n - 1) / cols + 1;
        sort(filename, filename + n);
        for (int i = 1; i <= 60; i++)
            cout << "-";
        cout << endl;
        for (int i = 0; i < rows; i++)
        {
            for (int j = 0; j < cols; j++)
            {
                int t = j * rows + i;
                if (t>=n)
                    continue;
                cout << filename[t];
                for (int k = 1; k <= M - filename[t].length();k++)
                {
                    cout << " ";
                }
                if (j < cols - 1)
                    cout << "  ";
            }
            cout << endl;
        }
    }
    return 0;
}