?1?/*
?2??*?SOUR:pku3334
?3??*?ALGO:二分高度，求水平線和多邊形的交點，求出多邊形面積
?4??*?DATE:?2010年?07月?07日?星期三?22:29:14?CST
?5??*?*/
?6?const?int?N?=?1024;
?7?struct?point_t?{
?8?????double?x,?y;
?9?????point_t?(){}
10?????point_t?(double?a,?double?b){x?=?a,?y?=?b;}
11?}P[N],?Q[N];
12?int?m,?n,?cp,?cq;
13?double?area;
14?
15?point_t?operator?+?(point_t?a,?point_t?b)?{?return?point_t(a.x?+?b.x,?a.y?+?b.y);}
16?point_t?operator?-?(point_t?a,?point_t?b)?{?return?point_t(a.x?-?b.x,?a.y?-?b.y);}
17?double?SQR(double?x?){?return?x?*?x;}
18?double?dist(point_t?a)?{?return?sqrt(SQR(a.x)?+?SQR(a.y));}
19?double?dist(point_t?a,?point_t?b)?{?return?dist(a-b);}
20?double?cross_mul(point_t?a,?point_t?b)?{?return?a.x?*?b.y?-?a.y?*?b.x;}
21?const?double?eps?=?1e-10;
22?
23?double?calcu(point_t?p[],?int?n,?int?cusp,?double?h)
24?{
25???double?ans?=?0;
26???int?i,?j,?k,?beg?=?0,?end?=?n?-?1;
27???if?(h?<=?p[cusp].y)?{
28???????return?0;
29???}
30???for?(i?=?0;i?<?cusp;i?++)?{
31???????if?(p[i].y?>=?h?&&?h?>=?p[i+1].y)?{
32???????????beg?=?i;break;
33???????}
34???}
35???for?(i?=?n?-?2;i?>=?cusp;i--)?{
36???????if?(p[i].y?<=?h?&&?h?<=?p[i+1].y)?{
37???????????end?=?i;break;
38???????}
39???}
40?
41???point_t?a?=?point_t(p[beg].x?+?(h?-?p[beg].y)?*?(p[beg+1].x?-?p[beg].x)
42???????????????????????/?(p[beg+1].y?-?p[beg].y)?,?h);
43???point_t?b?=?point_t(p[end].x?+?(h?-?p[end].y)?*?(p[end+1].x?-?p[end].x)
44???????????????????????/?(p[end+1].y?-?p[end].y)?,?h);
45???ans?+=?cross_mul(a,?p[beg+1])?+?cross_mul(p[end],?b)?+?cross_mul(b,?a);
46???for?(i?=?beg?+?1;i?<=?end?-?1;i++)?{
47???????ans?+=?cross_mul(p[i],?p[i+1]);
48???}
49???return?fabs(ans?/?2.0);
50?}
51?
52?int?main()
53?{
54???int?testcase,?i;
55???scanf("%d",?&testcase);
56???while?(testcase--)?{
57???????scanf("%lf",?&area);
58???????scanf("%d",?&m);?for?(i?=?0;i?<?m;i++)?{?scanf("%lf?%lf",?&P[i].x,?&P[i].y);?}
59???????scanf("%d",?&n);?for?(i?=?0;i?<?n;i++)?{?scanf("%lf?%lf",?&Q[i].x,?&Q[i].y);?}
60???????for?(i?=?1;i?<?m-1;i++)?{
61???????????if?(P[i-1].y?>=?P[i].y?&&?P[i].y?<=?P[i+1].y)?{
62???????????????cp?=?i;
63???????????}
64???????}
65???????for?(i?=?1;i?<?n-1;i++)?{
66???????????if?(Q[i-1].y?>=?Q[i].y?&&?Q[i].y?<=?Q[i+1].y)?{
67???????????????cq?=?i;
68???????????}
69???????}
70???????double?L?=?min(P[cp].y?,?Q[cq].y),
71??????????????R?=?min(min(P[0].y,?P[m?-?1].y)?,?min(Q[0].y,?Q[n?-?1].y))?;
72???????while?(L?+?eps?<?R)?{
73???????????double?mid?=?(L?+?R)?/?2.0;
74???????????double?A?=?calcu(P,?m,?cp,?mid)?+?calcu(Q,?n,?cq,?mid);
75???????????//printf("h?=?%.3f,?A?=?%.3f\n",?mid,?A);
76???????????if?(A?<=?area)?{
77???????????????L?=?mid;
78???????????}else?{
79???????????????R?=?mid;
80???????????}
81???????}
82???????printf("%.3f\n",?L);
83???}
84???return?0;
85?}
86?
87?
88?