求助，九度1020

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一直显示wrong

#include<stdlib.h>#include<stdio.h>#include<string>#include<cstring>#include<algorithm>#include<math.h>#include<queue>using namespace std;typedef struct{    int x,y;}point;bool cmp1(point a,point b){    return a.x<b.x;}bool cmp2(point a,point b){    return a.y<b.y;}point p[100];int main(){    int i,j,a,b,l;    while(scanf("%d %d",&a,&b)!=EOF&&a!=0&&b!=0)    {        if(a>=231) a=230;        if(a<=-231) a=-230;        if(b>=231) b=230;        if(b<=-231) b=-230;        l=0;        p[l].x=a;        p[l++].y=b;        while(scanf("%d %d",&a,&b)!=EOF&&a!=0&&b!=0)        {            if(a>=231) a=230;            if(a<=-231) a=-230;            if(b>=231) b=230;            if(b<=-231) b=-230;            p[l].x=a;            p[l++].y=b;        }        sort(p,p+l,cmp1);        int minx=p[0].x,maxx=p[l-1].x;        sort(p,p+l,cmp2);        int miny=p[0].y,maxy=p[l-1].y;        printf("%d %d %d %d\n",minx,miny,maxx,maxy);    }}

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