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| #include<stdio.h>
#include<algorithm>
#include<math.h>
#include<string.h>
using namespace std;
const int MAXN = 225;
int L[MAXN*MAXN], R[MAXN*MAXN], U[MAXN*MAXN], D[MAXN*MAXN];
int S[MAXN];
int Col[MAXN*MAXN];
int limit;
void Remove(int x) {
for (int i = D[x]; i != x; i = D[i]) {
L[R[i]] = L[i];
R[L[i]] = R[i];
}
}
void Resume(int x) {
for (int i = U[x]; i != x; i = U[i]) {
L[R[i]] = R[L[i]] = i;
}
}
int Hash() {
int ans = 0;
bool hash[MAXN] = {0};
for (int c = R[0]; c != 0; c = R[c])
if (! hash[c]) {
hash[c] = true;
ans ++;
for (int i = D[c]; i != c; i = D[i])
for (int j = R[i]; j != i; j = R[j])
hash[Col[j]] = true;
}
return ans;
}
bool dfs(int depth) {
if (depth + Hash() > limit) return false;
if (R[0] == 0) return true;
int i, j, c, minnum = 2000000000;
for (i = R[0]; i != 0; i = R[i]) {
if (S[i] < minnum) {
minnum = S[i];
c = i;
}
}
for (i = U[c]; i != c; i = U[i]) {
Remove(i);
for (j = R[i]; j != i; j = R[j]) Remove(j);
if (dfs(depth + 1)) {
for (j = L[i]; j != i; j = L[j]) Resume(j);
Resume(i);
return true;
}
for (j = L[i]; j != i; j = L[j]) Resume(j);
Resume(i);
}
return false;
}
int solve(int n, int m, int DL[][MAXN], int maxdepth) {
if (maxdepth > n) maxdepth = n;
for (int i = 0; i <= m; i ++) {
L[i] = i - 1;
R[i] = i + 1;
U[i] = D[i] = i;
}
L[0] = m;
R[m] = 0;
int cnt = m + 1;
memset(S, 0, sizeof (S));
for (int i = 1; i <= n; i ++) {
int head = cnt, tail = cnt;
for (int c = 1; c <= m; c ++) if (DL[i][c]) {
S[c] ++;
Col[cnt] = c;
U[D[c]] = cnt;
D[cnt] = D[c];
U[cnt] = c;
D[c] = cnt;
L[cnt] = tail;
R[tail] = cnt;
R[cnt] = head;
L[head] = cnt;
tail = cnt;
cnt ++;
}
}
int best = 0, worst = maxdepth;
/*while (best <= worst) {
limit = (worst + best) >> 1;
if (dfs(0)) worst = limit - 1;
else best = limit + 1;
}*/
limit = maxdepth;
if(dfs(0))best = maxdepth;
else
best = maxdepth+1;
return best;
}
int x[155],y[155];
int dij(int i, int j)
{
int d1 = (x[i]-x[j])*(x[i]-x[j]);
int d2 = (y[i]-y[j])*(y[i]-y[j]);
return d1+d2;
}
int main()
{
int i,j,k,l,row,col,n,m,low,up,mid,mark[MAXN][MAXN],d[55][55],T,b[3000],top;
scanf("%d",&T);
while(T--)
{
scanf("%d %d %d",&n,&row,&m);
for(i=1;i<=n+row;i++)
scanf("%d %d",&x[i],&y[i]);
low = 1; up = 1000000000;
while(low < up)
{
for(i=1;i<=row;i++)
for(j=1;j<=n;j++)mark[i][j] = 0;
mid = (low + up)>>1;
for(i=1;i<=row;i++)
for(j=1;j<=n;j++)if(dij(i+n,j) <= mid)mark[i][j] = 1;
if(solve(row, n, mark, m) > m)low = mid+1; else up = mid;
}
mid = (low + up)>>1;
printf("%.6lf\n",sqrt(1.0*mid));
}
return 0;
}
|
