10分钟完成此题
#include<iostream>
using namespace std;
int main()
{
//freopen("xxx.in","r",stdin);
//freopen("yyy.out","w",stdout);
int n,m,k=1;
cin >> n >> m;
for(int i=0;i<n;i++)
{
for(int j=0;j<m;j++)
{
if(j==m-1)
cout << "PUM" << endl;
else
cout << k << " ";
k++;
}
}
//fclose(stdin);
//fclose(stdout);
}