zoj 2099 Frame Polygonal Line

//zoj上long必须用%ld来读

#include<stdio.h>int main(){long a[2][2],x,y;while(scanf("%ld%ld",&x,&y)&&(x||y)){a[0][0] = x;a[0][1] = x;a[1][0] = y;a[1][1] = y;while(scanf("%ld%ld",&x,&y)&&(x||y)){if(x>a[0][1]) a[0][1] = x;if(x<a[0][0]) a[0][0] = x;if(y>a[1][1]) a[1][1] = y;if(y<a[1][0]) a[1][0] = y;}printf("%ld %ld %ld %ld\n",a[0][0],a[1][0],a[0][1],a[1][1]);}return 0;}