#include<bits/stdc++.h> using namespace std; int dx[4]={0,1,0,-1}; int dy[4]={1,0,-1,0}; int main(){ int n,m; int x,y; cin>>n>>m>>x>>y; for(int i=0;i<4;i++){ int xx=x+dx[i]; int yy=y+dy[i]; if(xx>=1 && xx<=n && yy>=1 && yy<=m){ cout<<xx<<" "<<yy<<endl; } else cout<<"NA"<<endl; } return 0; }

#include<bits/stdc++.h> using namespace std; int n,m,x,y; int dir_x[4]={0,1,0,-1}; int dir_y[4]={1,0,-1,0}; bool check(int x,int y){ return x>=1&&x<=n&&y>=1&&y<=m; } int main(){ cin>>n>>m>>x>>y; for(int i=0;i<4;i++){ int nx=x+dir_x[i]; int ny=y+dir_y[i]; if(check(nx,ny)) cout<<nx<<" "<<ny<<endl; else cout<<"NA"<<endl; } return 0; }

#include<bits/stdc++.h> using namespace std; int n,m,x,y; int dx[4]={0,1,0,-1}; int dy[4]={1,0,-1,0}; int main(){ cin>>n>>m>>x>>y; for(int i=0;i<=3;i++){ int l=x+dx[i]; int p=y+dy[i]; if(l<1||l>n||p<1||p>m){ cout<<"NA"<<endl; } else cout<<l<<" "<<p<<" "<<endl; } return 0; }

会个判断就行，要什么深搜......