title: 二维和一维坐标相互转换
categories:

  • ICPC
    tags:
  • null
    abbrlink: 78fd8a54
    date: 2024-08-20 00:00:00
int id(int x,int y,int m){
	//m列
	return m*(x-1)+y;
}
pii rid(int u,int m){
	int x=(u+m-1)/m;//m列
	int y=u%m;if(y==0)y+=m;
	return make_pair(x,y);
}