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| 1050199 |
2024-08-09T07:56:28 Z |
아침연습다풀고 hamburg 풀면 복붙날먹치팅할거임(#11102) |
함박 스테이크 (JOI20_hamburg) |
C++17 |
|
0 ms |
0 KB |
#include <bits/stdc++.h>
using namespace std;
using lint = long long;
using pi = array<int, 2>;
#define sz(v) ((int)(v).size())
#define all(v) (v).begin(), (v).end()
#define cr(v, n) (v).clear(), (v).resize(n);
const int inf = 1e9;
struct rect {
int sx, sy, ex, ey;
};
vector<pi> trace;
vector<rect> chop(vector<rect> a, pi p) {
vector<rect> z;
for (auto &r : a) {
if (r.sx <= p[0] && p[0] <= r.ex && r.sy <= p[1] && p[1] <= r.ey)
continue;
z.push_back(r);
}
return z;
}
void backtrack(vector<rect> a, int k, int p) {
if (sz(a) == 0) {
for (int i = 0; i < p; i++) {
cout << trace[i % sz(trace)][0] << " " << trace[i % sz(trace)][1] << "\n";
}
exit(0);
}
if (k == 0)
return;
int xmin = 2e9, ymin = 2e9, xmax = -2e9, ymax = -2e9;
for (auto &x : a) {
xmin = min(xmin, x.ex);
ymin = min(ymin, x.ey);
xmax = max(xmax, x.sx);
ymax = max(ymax, x.sy);
}
vector<pi> cp = {pi{xmax, ymax}, pi{xmax, ymin}, pi{xmin, ymax}, pi{xmin, ymin}};
for (auto &v : cp) {
trace.push_back(v);
backtrack(chop(a, v), k - 1, p);
trace.pop_back();
}
}
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
int n, k;
cin >> n >> k;
vector<rect> a(n);
for (auto &x : a) {
cin >> x.sx >> x.sy >> x.ex >> x.ey;
}
backtrack(a, k, k);
vector<int> vx, vy;
for (auto &x : a) {
vx.push_back(x.sx);
vy.push_back(x.sy);
}
sort(all(vx));
sort(all(vy));
vx.resize(unique(all(vx)) - vx.begin());
vy.resize(unique(all(vy)) - vy.begin());
int xmin = inf, xmax = -inf, ymin = inf, ymax = -inf;
for (auto &x : a) {
x.sx = lower_bound(all(vx), x.sx) - vx.begin();
x.sy = lower_bound(all(vy), x.sy) - vy.begin();
x.ex = upper_bound(all(vx), x.ex) - vx.begin() - 1;
x.ey = upper_bound(all(vy), x.ey) - vy.begin() - 1;
xmin = min(xmin, x.ex);
ymin = min(ymin, x.ey);
xmax = max(xmax, x.sx);
ymax = max(ymax, x.sy);
}
vector<pi> I(4);
I[0] = I[2] = {ymin + 1, ymax - 1};
I[1] = I[3] = {xmin + 1, xmax - 1};
vector<pi> transeuropeexpress[2];
auto contain = [&](rect &r, int sx, int ex, int sy, int ey) { return r.sx <= sx && ex <= r.ex && r.sy <= sy && ey <= r.ey; };
vector<int> L[4], R[4];
for (int i = 0; i < 4; i++) {
L[i].resize(i % 2 == 0 ? sz(sy) : sz(sx));
R[i].resize(i % 2 == 0 ? sz(sy) : sz(sx));
}
fill(all(L[0]), xmax - 1);
fill(all(L[1]), ymin + 1);
fill(all(L[2]), xmin + 1);
fill(all(L[3]), ymax - 1);
fill(all(R[0]), xmax - 1);
fill(all(R[1]), ymin + 1);
fill(all(R[2]), xmin + 1);
fill(all(R[3]), ymax - 1);
for (auto &x : a) {
if (contain(x, xmin, xmin, ymin, ymax))
continue;
if (contain(x, xmax, xmax, ymin, ymax))
continue;
if (contain(x, xmin, xmax, ymin, ymin))
continue;
if (contain(x, xmin, xmax, ymax, ymax))
continue;
if (x.ex < xmax)
if (ymin < x.sy && x.ey < ymax)
I[0] = cap(I[0], pi{x.sy, x.ey});
if (x.ey < ymax)
if (xmin < x.sx && x.ex < xmax)
I[1] = cap(I[1], pi{x.sx, x.ex});
if (x.sx > xmin)
if (ymin < x.sy && x.ey < ymax)
I[2] = cap(I[2], pi{x.sy, x.ey});
if (x.sx > ymin)
if (xmin < x.sx && x.ex < xmax)
I[3] = cap(I[3], pi{x.sx, x.ex});
if (x.sx <= xmin && xmax <= x.ex) {
transeuropeexpress[0].push_back({x.sy, x.ey});
} else if (x.sy <= ymin && ymax <= x.ey) {
transeuropeexpress[1].push_back({x.sx, x.ex});
} else {
if (contain(x, xmin, xmin, ymax, ymax)) {
R[0][x.sy - 1] = min(R[0][x.sy - 1], x.ex);
L[1][x.ex + 1] = max(L[1][x.ex + 1], x.sy);
}
if (contain(x, xmax, xmax, ymax, ymax)) {
R[1][x.sx - 1] = max(R[1][x.sx - 1], x.sy);
L[2][x.sy - 1] = max(L[2][x.sy - 1], x.sx);
}
if (contain(x, xmax, xmax, ymin, ymin)) {
R[2][x.ey + 1] = max(R[2][x.ey + 1], x.sx);
L[3][x.sx - 1] = min(L[3][x.sx - 1], x.ey);
}
if (contain(x, xmin, xmin, ymin, ymin)) {
R[3][x.ex + 1] = min(R[3][x.ex + 1], x.ey);
L[0][x.ey + 1] = min(L[0][x.ey + 1], x.ex);
}
}
}
for (int i = 1; i < sz(L[0]); i++)
L[0][i] = min(L[0][i], L[0][i - 1]);
for (int i = 1; i < sz(L[1]); i++)
L[1][i] = max(L[1][i], L[1][i - 1]);
for (int i = 1; i < sz(L[2]); i++)
L[2][i] = max(L[2][i], L[2][i - 1]);
for (int i = 1; i < sz(L[3]); i++)
L[3][i] = min(L[3][i], L[3][i - 1]);
for (int i = sz(R[0]) - 2; i >= 0; i--)
R[0][i] = min(R[0][i], R[0][i + 1]);
for (int i = sz(R[1]) - 2; i >= 0; i--)
R[1][i] = max(R[1][i], R[1][i + 1]);
for (int i = sz(R[2]) - 2; i >= 0; i--)
R[2][i] = max(R[2][i], R[2][i + 1]);
for (int i = sz(R[3]) - 2; i >= 0; i--)
R[3][i] = min(R[3][i], R[3][i + 1]);
vector<pi> fn[2];
fn[0].resize(sz(vy));
fn[1].resize(sz(vx));
for (int i = I[0][0]; i <= I[0][1]; i++) {
fn[0][i] = I[2];
for (auto &[l, r] : transeuropeexpress[0]) {
if (l <= i && i <= r)
continue;
fn[0][i][0] = max(fn[0][i][0], l);
fn[0][i][1] = min(fn[0][i][1], r);
}
}
for (int i = I[1][0]; i <= I[1][1]; i++) {
fn[1][i] = I[3];
for (auto &[l, r] : transeuropeexpress[1]) {
if (l <= i && i <= r)
continue;
fn[1][i][0] = max(fn[1][i][0], l);
fn[1][i][1] = min(fn[1][i][1], r);
}
}
for (int x = I[0][0]; x <= I[0][1]; x++) {
for (int y = I[1][0]; y <= I[1][1]; y++) {
if (fn[0][x][0] > fn[0][x][1] || fn[1][y][0] > fn[1][y][1])
continue;
if (y > R[0][x])
continue;
if (fn[0][x][1] < R[1][y])
continue;
if (fn[1][y][0] > L[0][x])
continue;
int oppx = max(fn[0][x][0], R[1][y]);
int oppy = min(fn[1][y][1], L[0][x]);
if (R[2][oppx] >= oppy) {
cout << vx[xmin] << " " << vy[x] << "\n";
cout << vx[xmax] << " " << vy[oppx] << "\n";
cout << vx[y] << " " << vy[ymin] << "\n";
cout << vx[oppy] << " " << vy[ymax] << "\n";
return 0;
}
}
}
}
Compilation message
hamburg.cpp: In function 'int main()':
hamburg.cpp:88:31: error: 'sy' was not declared in this scope; did you mean 'vy'?
88 | L[i].resize(i % 2 == 0 ? sz(sy) : sz(sx));
| ^~
hamburg.cpp:5:22: note: in definition of macro 'sz'
5 | #define sz(v) ((int)(v).size())
| ^
hamburg.cpp:88:40: error: 'sx' was not declared in this scope; did you mean 'vx'?
88 | L[i].resize(i % 2 == 0 ? sz(sy) : sz(sx));
| ^~
hamburg.cpp:5:22: note: in definition of macro 'sz'
5 | #define sz(v) ((int)(v).size())
| ^
hamburg.cpp:110:12: error: 'cap' was not declared in this scope
110 | I[0] = cap(I[0], pi{x.sy, x.ey});
| ^~~
hamburg.cpp:113:12: error: 'cap' was not declared in this scope
113 | I[1] = cap(I[1], pi{x.sx, x.ex});
| ^~~
hamburg.cpp:116:12: error: 'cap' was not declared in this scope
116 | I[2] = cap(I[2], pi{x.sy, x.ey});
| ^~~
hamburg.cpp:119:12: error: 'cap' was not declared in this scope
119 | I[3] = cap(I[3], pi{x.sx, x.ex});
| ^~~
