代码始终写不出来，这题要用多少次循环？该怎么循环？

Question

#include <iostream>
#include <cmath>
#include <string.h>
using namespace std;
int main()
{
    int m,n;
    cin>>m>>n;
    int a[n^m][m+1];
    memset(a,1,sizeof(a));
    for(int i=0;i<n^m;i++)
    {
        for(int j=0;j<m;j++)
        {

        }
    }
    for(int i=0;i<n^m;i++)
    {
        for(int j=1;j<m;j++)
        {
            if(j%2)           //奇数项
            {
                if(a[i][j]<a[i][j-1])
                     a[i][m]=0;
            }
            else
            {
                if(a[i][j]>a[i][j-1])
                     a[i][m]=0;
             } 
        }
     } 
     for(int i=0;i<n^m;i++)
     {
        if(a[i][m])
        {
            for(int j=0;j<m;j++)
            {
                cout<<a[i][j]<<" ";
             }
         }
         cout<<endl;
     }
}

Answer 1

拿C#给你写一个

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Q1064385
{
    class Program
    {
        static IEnumerable<List<int>> foo(List<int> seed, int seedn, int remain, List<int> range)
        {
            if (remain == 0)
            {
                yield return seed;
            }
            else if (seed == null)
            {
                foreach (var item in foo(Enumerable.Repeat(0, remain).ToList(), 0, remain, range))
                    yield return item;
            }
            else 
            {
                Func<int, bool> cond1 = x => x > range.Min();
                Func<int, bool> cond2 = x => x > seed[seedn - 1];
                Func<int, bool> cond3 = x => x < seed[seedn - 1];
                foreach (var i in range.Where(seedn == 0 ? cond1 : (seedn % 2 == 0 ? cond2 : cond3)))
                {
                    var newlist = seed.ToList();
                    newlist[seedn] = i;
                    foreach (var item in foo(newlist, seedn + 1, remain - 1, range))
                        yield return item;
                }
            }
        }
        static void Main(string[] args)
        {
            string s = Console.ReadLine();
            int m = int.Parse(s.Split(' ')[0]);
            int n = int.Parse(s.Split(' ')[1]);
            var result = foo(null, 0, m, Enumerable.Range(1, n).ToList());
            foreach (var item in result)
                Console.WriteLine(string.Join(" ", item.Select(x => x.ToString())));
            Console.WriteLine(result.Count());
        }
    }
}

3 4
2 1 2
2 1 3
2 1 4
3 1 2
3 1 3
3 1 4
3 2 3
3 2 4
4 1 2
4 1 3
4 1 4
4 2 3
4 2 4
4 3 4
14
Press any key to continue . . .