#include <bits/stdc++.h>
using namespace std;
int a[110][101];
int main() {
int n,m,i,j,num=1;
scanf("%d %d",&n,&m);
if(n>100||m<1||m>3||n%2==0||n<1){
printf("INPUT ERROR!");
}
else if(m==1){
for(i=1;i<=n;i++){
if(i%2==1){
for(j=1;j<=i;j++){
a[i][j]==num++;
}
}
if(i%2==0){
for(j=i;j>=1;j--){
a[i][j]==num++;
}
}
}
}
else if(m==2){
}
else if(m==3){
}
return 0;
}
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