/*
_ _ _______ _ _
| | / / | _____| | | / /
| | / / | | | | / /
| |/ / | |_____ | |/ /
| |\ \ | _____| | |\ \
| | \ \ | | | | \ \
| | \ \ | |_____ | | \ \
|_| \_\ |_______| |_| \_\
*/
#include <bits/stdc++.h>
#define int long long
using namespace std;
typedef unsigned long long ull;
typedef long long ll;
typedef double ld;
typedef pair <int, int> PII;
typedef pair <ll, ll> PLL;
typedef pair < ll, int > PLI;
#define F first
#define S second
#define pb push_back
#define eb emplace_back
#define right(x) x << 1 | 1
#define left(x) x << 1
#define forn(x, a, b) for (int x = a; x <= b; ++x)
#define for1(x, a, b) for (int x = a; x >= b; --x)
#define mkp make_pair
#define sz(a) (int)a.size()
#define all(a) a.begin(), a.end()
#define y1 kekekek
#define fname ""
const ll ool = 1e18 + 9;
const int oo = 1e9 + 9, base = 1e9 + 7;
const ld eps = 1e-7;
const int N = 1e6 + 6;
int n, m, sz;
bool u[N];
PII a[N], b[N], c[N];
ll cross(PII a, PII b) {
return 1ll * a.F * b.S - 1ll * a.S * b.F;
}
bool cmp(PII a, PII a2) {
if (cross(PII(a.F - b[1].F, a.S - b[1].S), PII(a2.F - b[1].F, a2.S - b[1].S)) != 0) return cross(PII(a.F - b[1].F, a.S - b[1].S), PII(a2.F - b[1].F, a2.S - b[1].S)) > 0;
return 1ll * (a.F - b[1].F) * (a.F - b[1].F) + 1ll * (a.S - b[1].S) * (a.S - b[1].S) < 1ll * (a2.F - b[1].F) * (a2.F - b[1].F) + 1ll * (a2.S - b[1].S) * (a2.S - b[1].S);
}
main() {
#ifdef krauch
freopen("input.txt", "r", stdin);
#else
//freopen(fname".in", "r", stdin);
//freopen(fname".out", "w", stdout);
#endif
cin >> n;
forn(i, 1, n) {
cin >> a[i].F >> a[i].S;
a[i + n] = a[i];
}
cin >> m;
int mn = 1;
ll kek = ool;
forn(i, 1, m) {
cin >> b[i].F >> b[i].S;
if (b[i].S < b[mn].S || (b[i].S == b[mn].S && b[i].F > b[mn].F)) mn = i;
kek = min(kek, b[i].F);
}
swap(b[1], b[mn]);
sort(b + 2, b + m + 1, cmp);
c[++sz] = b[1];
if (m > 1) c[++sz] = b[2];
forn(i, 3, m) {
while (sz > 1 && cross(PII(b[i].F - c[sz - 1].F, b[i].S - c[sz - 1].S), PII(c[sz].F - c[sz - 1].F, c[sz].S - c[sz - 1].S)) >= 0) {
--sz;
}
c[++sz] = b[i];
}
while (sz > 2 && cross(PII(b[1].F - c[sz - 1].F, b[1].S - c[sz - 1].S), PII(c[sz].F - c[sz - 1].F, c[sz].S - c[sz - 1].S)) >= 0) {
--sz;
}
forn(i, 1, sz) c[i + sz] = c[i];
int ptr = sz + 1;
while (ptr > 1 && cross(PII(c[ptr - 1].F - a[1].F, c[ptr - 1].S - a[1].S), PII(c[ptr].F - a[1].F, c[ptr].S - a[1].S)) < 0) --ptr;
while (ptr < 2 * sz && cross(PII(c[ptr + 1].F - a[1].F, c[ptr + 1].S - a[1].S), PII(c[ptr].F - a[1].F, c[ptr].S - a[1].S)) < 0) ++ptr;
if (ptr > sz) ptr -= sz;
int ptr2 = 1;
ll A = 0, ans = 0;
forn(i, 3, 2 * n) {
A += abs(cross(PII(a[i].F - a[ptr2].F, a[i].S - a[ptr2].S), PII(a[i - 1].F - a[ptr2].F, a[i - 1].S - a[ptr2].S)));
while (cross(PII(c[ptr + 1].F - a[i].F, c[ptr + 1].S - a[i].S), PII(c[ptr].F - a[i].F, c[ptr].S - a[i].S)) < 0) {
++ptr;
if (ptr == 2 * sz) ptr -= sz;
}
while (ptr2 < i - 1 && cross(PII(a[ptr2].F - a[i].F, a[ptr2].S - a[i].S), PII(c[ptr].F - a[i].F, c[ptr].S - a[i].S)) >= 0) {
A -= abs(cross(PII(a[ptr2].F - a[i].F, a[ptr2].S - a[i].S), PII(a[ptr2 + 1].F - a[i].F, a[ptr2 + 1].S - a[i].S)));
++ptr2;
}
ans = max(ans, A);
}
cout << ans << "\n";
return 0;
}
Compilation message
sir.cpp:58:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
main() {
^
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
49876 KB |
Output is correct |
| 2 |
Correct |
1 ms |
49876 KB |
Output is correct |
| 3 |
Correct |
0 ms |
49876 KB |
Output is correct |
| 4 |
Correct |
0 ms |
49876 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
49876 KB |
Output is correct |
| 2 |
Correct |
3 ms |
49876 KB |
Output is correct |
| 3 |
Correct |
6 ms |
49876 KB |
Output is correct |
| 4 |
Correct |
3 ms |
49876 KB |
Output is correct |
| 5 |
Correct |
1 ms |
49876 KB |
Output is correct |
| 6 |
Correct |
6 ms |
49876 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
579 ms |
49876 KB |
Output is correct |
| 2 |
Correct |
568 ms |
49876 KB |
Output is correct |
| 3 |
Correct |
439 ms |
49876 KB |
Output is correct |
| 4 |
Correct |
169 ms |
49876 KB |
Output is correct |
| 5 |
Correct |
413 ms |
49876 KB |
Output is correct |
| 6 |
Correct |
455 ms |
49876 KB |
Output is correct |
