sysu-1，ural1894，闽科夫斯基和（黑科技）

#include <cstdio>
#include <string>
#include <iostream>
#include <algorithm>
#include <cmath>
#include <cstring>
#include <complex>
#include <set>
#include <vector>
#include <map>
#include <queue>
#include <deque>

using namespace std;

const double EPS = 1e-8;

#define ABS(x) ((x)<0?(-(x)):(x))
#define SQR(x) ((x)*(x))
#define MIN(a,b) ((a)<(b)?(a):(b))
#define MAX(a,b) ((a)>(b)?(a):(b))

#define LSON(x) ((x)<<1)
#define RSON(x) (((x)<<1)+1)
#define LOWBIT(x) ((x)&(-(x)))
#define MAXN 111111
#define LL long long

int cmp(const double &x) {
    return x < -EPS ? -1 : (x > EPS ? 1 : 0);
}

struct point{
    double x, y;
    point(double a = 0, double b = 0): x(a), y(b) {}

    point operator + (const point &rhs) const {
        return point(x + rhs.x, y + rhs.y);
    }
    point operator - (const point &rhs) const {
        return point(x - rhs.x, y - rhs.y);
    }
    point operator * (const double &rhs) const {
        return point(x * rhs, y * rhs);
    }
    point operator / (const double &rhs) const {
        return point(x / rhs, y / rhs);
    }
    bool operator < (const point &rhs) const {
        if (cmp(x - rhs.x) == 0) return y < rhs.y;
        return x < rhs.x;
    }

    void read() {
        scanf("%lf%lf", &x, &y);
    }
    void write() const {
        printf("%lf %lf\n", x, y);
    }
    double norm() const {
        return sqrt(SQR(x) + SQR(y));
    }
};

double dot(const point &a, const point &b) {
    return a.x * b.x + a.y * b.y;
}

double det(const point &a, const point &b) {
    return a.x * b.y - a.y * b.x;
}

typedef point Point;
//#define Point point
typedef pair<Point, Point > Halfplane;
typedef vector<Point > Convex;

inline double arg(const point &a) {
    double res = atan2(a.y, a.x);
    return res;
}

#define cross(a,b) det(a,b)

void PointProjLine(const point &p, const point &s, const point &t, point &cp) {
    double r = dot((t-s), (p-s))/dot(t-s, t-s);
    cp = s + (t - s) * r;
}

int n, m;
Convex a, b, c;
double ans;

struct data{
    double a;
    point st, ed;
    int col;
    data() {}
    data(double aa, point b, point c, int d): a(aa), st(b), ed(c), col(d) {}
    bool operator < (const data &rhs) const {
        return a < rhs.a;
    }
};

vector <data > aa;
vector <point > key;

const double PI = acos(-1);

void init() {
    double ans = 1e30;
    Point x;
    scanf("%d%d", &n, &m);
    for (int i = 0; i < n; ++i) {
        x.read(); a.push_back(x);
    } a.push_back(a[0]);

    for (int i = 0; i < n; ++i) {
        aa.push_back(data(arg((a[i+1] - a[i])) + 2 * PI, a[i], a[i+1], 0));
    }

    for (int i = 0; i < m; ++i) {
        x.read(); b.push_back(x*-1);
    } b.push_back(b[0]);
    for (int i = 0; i < m; ++i) {
        aa.push_back(data(arg((b[i+1] - b[i])) + 2 * PI, b[i], b[i+1], 1));
    }
    sort(aa.begin(), aa.end());
}

double dist(const point &p, const point &s, const point &t) {
    point tt;
    PointProjLine(p, s, t, tt);
    return (p - tt).norm();
}

void solve() {
    point now = point(0, 0);
    aa.push_back(aa[0]);
    for (int i = 0; i < n+m; ++i) {
        now = now + (aa[i].ed - aa[i].st);
        key.push_back(now);
    }
    point dd;
    key.push_back(key[0]);

    for (int i = 0; i + 1 < n+m; ++i) {
        if (aa[i].col != aa[i+1].col) {
            dd = (aa[i].ed + aa[i+1].st) - key[i];
            break;
        }
    }
    for (int i = 0; i < key.size(); ++i) {
        key[i] = key[i] + dd;
    }
    ans = 1e30;
    for (int i = 0; i < n+m; ++i) {
        ans = min(ans, dist(point(0, 0), key[i], key[i+1]));
    }
}


int main() {
    freopen("test.txt", "r", stdin);
    init();
    solve();
    if (ans < 60) puts("0");
    else printf("%.8lf\n", max(0.0, ans - 60));
    return 0;
}