OJ-Problems-Source/HDOJ/4145_autoAC.cpp

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#include<iostream>
#include<cstdio>
#include<cstring>
#include<algorithm>
using namespace std;
#define N 100010
struct enemy
{
int x, y, da, db;
}p[N], c1, c2;
bool cmp(enemy a, enemy b)
{
return a.da < b.da;
}
int dist(enemy a, enemy b)
{
return ((a.x - b.x) * (a.x - b.x) + (a.y - b.y) * (a.y - b.y));
}
int main()
{
int ncase;
int num;
int ans, res, onlyb;
scanf("%d", &ncase);
while(ncase--)
{
scanf("%d%d%d%d", &c1.x, &c1.y, &c2.x, &c2.y);
scanf("%d", &num);
for(int i = 0; i < num; ++i)
{
scanf("%d%d", &p[i].x, &p[i].y);
p[i].da = dist(c1, p[i]);
p[i].db = dist(c2, p[i]);
}
sort(p, p + num, cmp);
res = p[num - 1].da;
ans = 0;
for(int i = num - 2; i >= 0; --i)
{
ans = max(ans, p[i + 1].db);
res = min(res, ans + p[i].da);
}
ans = max(ans, p[0].db);
res = min(res, ans);
printf("%d\n", res);
}
return 0;
}