#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using db = long double; // or double, if TL is tight
using str = string; // yay python!
using pi = pair<int,int>;
using pl = pair<ll,ll>;
using pd = pair<db,db>;
using vi = vector<int>;
using vb = vector<bool>;
using vl = vector<ll>;
using vd = vector<db>;
using vs = vector<str>;
using vpi = vector<pi>;
using vpl = vector<pl>;
using vpd = vector<pd>;
#define tcT template<class T
#define tcTU tcT, class U
// ^ lol this makes everything look weird but I'll try it
tcT> using V = vector<T>;
tcT, size_t SZ> using AR = array<T,SZ>;
tcT> using PR = pair<T,T>;
// pairs
#define mp make_pair
#define f first
#define s second
// vectors
// oops size(x), rbegin(x), rend(x) need C++17
#define sz(x) int((x).size())
#define bg(x) begin(x)
#define all(x) bg(x), end(x)
#define rall(x) x.rbegin(), x.rend()
#define sor(x) sort(all(x))
#define rsz resize
#define ins insert
#define ft front()
#define bk back()
#define pb push_back
#define eb emplace_back
#define pf push_front
#define rtn return
#define lb lower_bound
#define ub upper_bound
tcT> int lwb(V<T>& a, const T& b) { return int(lb(all(a),b)-bg(a)); }
// loops
#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)
#define R0F(i,a) ROF(i,0,a)
#define rep(a) F0R(_,a)
#define each(a,x) for (auto& a: x)
const int MOD = 1e9+7; // 998244353;
const int MX = 2e5+5;
const ll INF = 1e18; // not too close to LLONG_MAX
const db PI = acos((db)-1);
const int dx[4] = {1,0,-1,0}, dy[4] = {0,1,0,-1}; // for every grid problem!!
mt19937 rng((uint32_t)chrono::steady_clock::now().time_since_epoch().count());
template<class T> using pqg = priority_queue<T,vector<T>,greater<T>>;
// bitwise ops
// also see https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html
constexpr int pct(int x) { return __builtin_popcount(x); } // # of bits set
constexpr int bits(int x) { // assert(x >= 0); // make C++11 compatible until USACO updates ...
return x == 0 ? 0 : 31-__builtin_clz(x); } // floor(log2(x))
constexpr int p2(int x) { return 1<<x; }
constexpr int msk2(int x) { return p2(x)-1; }
ll cdiv(ll a, ll b) { return a/b+((a^b)>0&&a%b); } // divide a by b rounded up
ll fdiv(ll a, ll b) { return a/b-((a^b)<0&&a%b); } // divide a by b rounded down
tcT> bool ckmin(T& a, const T& b) {
return b < a ? a = b, 1 : 0; } // set a = min(a,b)
tcT> bool ckmax(T& a, const T& b) {
return a < b ? a = b, 1 : 0; }
tcTU> T fstTrue(T lo, T hi, U f) {
hi ++; assert(lo <= hi); // assuming f is increasing
while (lo < hi) { // find first index such that f is true
T mid = lo+(hi-lo)/2;
f(mid) ? hi = mid : lo = mid+1;
}
return lo;
}
tcTU> T lstTrue(T lo, T hi, U f) {
lo --; assert(lo <= hi); // assuming f is decreasing
while (lo < hi) { // find first index such that f is true
T mid = lo+(hi-lo+1)/2;
f(mid) ? lo = mid : hi = mid-1;
}
return lo;
}
tcT> void remDup(vector<T>& v) { // sort and remove duplicates
sort(all(v)); v.erase(unique(all(v)),end(v)); }
tcTU> void erase(T& t, const U& u) { // don't erase
auto it = t.find(u); assert(it != end(t));
t.erase(it); } // element that doesn't exist from (multi)set
#define tcTUU tcT, class ...U
inline namespace Helpers {
//////////// is_iterable
// https://stackoverflow.com/questions/13830158/check-if-a-variable-type-is-iterable
// this gets used only when we can call begin() and end() on that type
tcT, class = void> struct is_iterable : false_type {};
tcT> struct is_iterable<T, void_t<decltype(begin(declval<T>())),
decltype(end(declval<T>()))
>
> : true_type {};
tcT> constexpr bool is_iterable_v = is_iterable<T>::value;
//////////// is_readable
tcT, class = void> struct is_readable : false_type {};
tcT> struct is_readable<T,
typename std::enable_if_t<
is_same_v<decltype(cin >> declval<T&>()), istream&>
>
> : true_type {};
tcT> constexpr bool is_readable_v = is_readable<T>::value;
//////////// is_printable
// // https://nafe.es/posts/2020-02-29-is-printable/
tcT, class = void> struct is_printable : false_type {};
tcT> struct is_printable<T,
typename std::enable_if_t<
is_same_v<decltype(cout << declval<T>()), ostream&>
>
> : true_type {};
tcT> constexpr bool is_printable_v = is_printable<T>::value;
}
inline namespace Input {
tcT> constexpr bool needs_input_v = !is_readable_v<T> && is_iterable_v<T>;
tcTUU> void re(T& t, U&... u);
tcTU> void re(pair<T,U>& p); // pairs
// re: read
tcT> typename enable_if<is_readable_v<T>,void>::type re(T& x) { cin >> x; } // default
tcT> void re(complex<T>& c) { T a,b; re(a,b); c = {a,b}; } // complex
tcT> typename enable_if<needs_input_v<T>,void>::type re(T& i); // ex. vectors, arrays
tcTU> void re(pair<T,U>& p) { re(p.f,p.s); }
tcT> typename enable_if<needs_input_v<T>,void>::type re(T& i) {
each(x,i) re(x); }
tcTUU> void re(T& t, U&... u) { re(t); re(u...); } // read multiple
// rv: resize and read vectors
void rv(size_t) {}
tcTUU> void rv(size_t N, V<T>& t, U&... u);
template<class...U> void rv(size_t, size_t N2, U&... u);
tcTUU> void rv(size_t N, V<T>& t, U&... u) {
t.rsz(N); re(t);
rv(N,u...); }
template<class...U> void rv(size_t, size_t N2, U&... u) {
rv(N2,u...); }
// dumb shortcuts to read in ints
void decrement() {} // subtract one from each
tcTUU> void decrement(T& t, U&... u) { --t; decrement(u...); }
#define ints(...) int __VA_ARGS__; re(__VA_ARGS__);
#define int1(...) ints(__VA_ARGS__); decrement(__VA_ARGS__);
}
inline namespace ToString {
tcT> constexpr bool needs_output_v = !is_printable_v<T> && is_iterable_v<T>;
// ts: string representation to print
tcT> typename enable_if<is_printable_v<T>,str>::type ts(T v) {
stringstream ss; ss << fixed << setprecision(15) << v;
return ss.str(); } // default
tcT> str bit_vec(T t) { // bit vector to string
str res = "{"; F0R(i,sz(t)) res += ts(t[i]);
res += "}"; return res; }
str ts(V<bool> v) { return bit_vec(v); }
template<size_t SZ> str ts(bitset<SZ> b) { return bit_vec(b); } // bit vector
tcTU> str ts(pair<T,U> p); // pairs
tcT> typename enable_if<needs_output_v<T>,str>::type ts(T v); // vectors, arrays
tcTU> str ts(pair<T,U> p) { return "("+ts(p.f)+", "+ts(p.s)+")"; }
tcT> typename enable_if<is_iterable_v<T>,str>::type ts_sep(T v, str sep) {
// convert container to string w/ separator sep
bool fst = 1; str res = "";
for (const auto& x: v) {
if (!fst) res += sep;
fst = 0; res += ts(x);
}
return res;
}
tcT> typename enable_if<needs_output_v<T>,str>::type ts(T v) {
return "{"+ts_sep(v,", ")+"}"; }
// for nested DS
template<int, class T> typename enable_if<!needs_output_v<T>,vs>::type
ts_lev(const T& v) { return {ts(v)}; }
template<int lev, class T> typename enable_if<needs_output_v<T>,vs>::type
ts_lev(const T& v) {
if (lev == 0 || !sz(v)) return {ts(v)};
vs res;
for (const auto& t: v) {
if (sz(res)) res.bk += ",";
vs tmp = ts_lev<lev-1>(t);
res.ins(end(res),all(tmp));
}
F0R(i,sz(res)) {
str bef = " "; if (i == 0) bef = "{";
res[i] = bef+res[i];
}
res.bk += "}";
return res;
}
}
inline namespace Output {
template<class T> void pr_sep(ostream& os, str, const T& t) { os << ts(t); }
template<class T, class... U> void pr_sep(ostream& os, str sep, const T& t, const U&... u) {
pr_sep(os,sep,t); os << sep; pr_sep(os,sep,u...); }
// print w/ no spaces
template<class ...T> void pr(const T&... t) { pr_sep(cout,"",t...); }
// print w/ spaces, end with newline
void ps() { cout << "\n"; }
template<class ...T> void ps(const T&... t) { pr_sep(cout," ",t...); ps(); }
// debug to cerr
template<class ...T> void dbg_out(const T&... t) {
pr_sep(cerr," | ",t...); cerr << endl; }
void loc_info(int line, str names) {
cerr << "Line(" << line << ") -> [" << names << "]: "; }
template<int lev, class T> void dbgl_out(const T& t) {
cerr << "\n\n" << ts_sep(ts_lev<lev>(t),"\n") << "\n" << endl; }
#ifdef LOCAL
#define dbg(...) loc_info(__LINE__,#__VA_ARGS__), dbg_out(__VA_ARGS__)
#define dbgl(lev,x) loc_info(__LINE__,#x), dbgl_out<lev>(x)
#else // don't actually submit with this
#define dbg(...) 0
#define dbgl(lev,x) 0
#endif
}
inline namespace FileIO {
void setIn(str s) { freopen(s.c_str(),"r",stdin); }
void setOut(str s) { freopen(s.c_str(),"w",stdout); }
void setIO(str s = "") {
cin.tie(0)->sync_with_stdio(0); // unsync C / C++ I/O streams
// cin.exceptions(cin.failbit);
// throws exception when do smth illegal
// ex. try to read letter into int
if (sz(s)) setIn(s+".in"), setOut(s+".out"); // for old USACO
}
}
int N,K;
vpl points;
pair<ll,V<pair<pl,pl>>> ans;
tcT> void order(T& a, T& b) {
if (a > b) swap(a,b);
}
const ll BIG = 3e9;
pair<pl,pl> make_square(ll x, ll y, ll len) { // OK
assert(len > 0);
assert(abs(x) <= BIG);
assert(abs(y) <= BIG);
assert(abs(x+len) <= BIG);
assert(abs(y+len) <= BIG);
return {{x,y},{x+len,y+len}};
}
void fail(bool b, bool flag) {
if (b) {
exit(flag);
}
}
pair<ll,V<pair<pl,pl>>> eval(V<pair<pl,pl>> cand) {
ll len = 0;
each(t,cand) ckmax(len,abs(t.s.f-t.f.f));
return {len,cand};
}
void check(V<pair<pl,pl>> cand, bool flag = false) { // OK
assert(sz(cand) <= K);
// ll len = 0;
// each(t,cand) ckmax(len,abs(t.s.f-t.f.f));
each(t,cand) {
fail(abs(t.f.f) > BIG,flag);
fail(abs(t.f.s) > BIG,flag);
fail(abs(t.s.f) > BIG,flag);
fail(abs(t.s.s) > BIG,flag);
}
int cnt = 0;
while (sz(cand) < K) {
if (cnt == 0) {
cand.pb(make_square(BIG-5,BIG-5,1));
} else {
cand.pb(make_square(-BIG+5,-BIG+5,1));
}
++cnt;
}
each(t,cand) {
fail(abs(t.f.f) > BIG,flag);
fail(abs(t.f.s) > BIG,flag);
fail(abs(t.s.f) > BIG,flag);
fail(abs(t.s.s) > BIG,flag);
}
ckmin(ans,eval(cand));
// dbg("AH",len,cand,ans.f);
// if (len < ans.f) ans = {len,cand};
}
using Square = pair<pl,pl>;
vpl rev(vpl v) { // OK
reverse(all(v));
return v;
}
vpl neg(vpl v) { // OK
each(t,v) t.f *= -1;
return v;
}
V<Square> get_prefs(vpl v) {
ll xl = v[0].f, xr = v[0].f;
ll yl = v[0].s, yr = v[0].s;
V<Square> prefs;
F0R(i,sz(v)) {
ckmin(xl,v[i].f), ckmax(xr,v[i].f);
ckmin(yl,v[i].s), ckmax(yr,v[i].s);
ll len = max({xr-xl,yr-yl,1LL});
prefs.pb(make_square(xr-len,yl,len)); // maximize the y-coordinate, minimize the x-coordinate
}
return prefs;
}
V<Square> neg(V<Square> v) {// OK, negate x values
each(t,v) t.f.f *= -1, t.s.f *= -1;
return v;
}
ll get_len(Square sq) {
ll dif = sq.s.f-sq.f.f; assert(dif > 0);
return dif;
}
pair<ll,V<Square>> solve_opt_2(vpl rem) {
assert(sz(rem));
sort(all(rem));
V<Square> pref_square = get_prefs(rem);
V<Square> suf_square = neg(get_prefs(rev(neg(rem))));
pair<ll,V<Square>> res = eval({pref_square.bk});
F0R(i,sz(rem)-1) if (rem.at(i).f < rem.at(i+1).f)
ckmin(res,eval({pref_square.at(i),suf_square.at(i+1)}));
return res;
}
V<Square> swap_xy_sq(V<Square> v) {
each(t,v) {
swap(t.f.f,t.f.s);
swap(t.s.f,t.s.s);
}
return v;
}
void solve() {
sor(points);
V<Square> pref_square = get_prefs(points);
V<Square> suf_square = neg(get_prefs(rev(neg(points))));
{ // K == 1
check({pref_square.bk});
}
if (K >= 2) { // K == 2
reverse(all(suf_square));
F0R(i,sz(pref_square)-1) if (points[i].f < points[i+1].f) {
check({pref_square[i],suf_square[i+1]}, true);
}
// dbg("HUH",v);
// dbg(pref_square);
// dbg(suf_square);
// dbg(ans);
}
if (K >= 3) {
vi tri_inds;
F0R(i,sz(points)-1) if (points.at(i).f < points.at(i+1).f) {
tri_inds.pb(i);
}
auto check_sol = [&](int ind) -> ll {
auto swap_xy = [&](pl p) {
swap(p.f,p.s);
return p;
};
// check distinct y
vpl rem;
FOR(i,ind+1,sz(points)) rem.pb(swap_xy(points.at(i)));
auto ans_y = solve_opt_2(rem);
ans_y.s = swap_xy_sq(ans_y.s);
// check distinct x
ll xl = MOD, xr = -MOD;
ll yl = MOD, yr = -MOD;
FOR(i,ind+1,sz(points)-1) {
ckmin(xl,points.at(i).f); ckmax(xr,points.at(i).f);
ckmin(yl,points.at(i).s); ckmax(yr,points.at(i).s);
// dbg("??",i,xl,xr,yl,yr);
if (points.at(i).f < points.at(i+1).f) {
ll len = max({xr-xl,yr-yl,1LL});
ll nxl = max(points.at(ind).f+1,xr-len);
ll nxr = max(xr,nxl+len);
// dbg("INDEX",i,nxl,nxr);
if (nxr < points.at(i+1).f) {
// dbg("OO UPDATING",i);
ckmin(ans_y,eval({make_square(nxl,yl,len),suf_square.at(i+1)}));
}
}
}
ans_y.s.pb(pref_square.at(ind));
ans_y = eval(ans_y.s); ckmin(ans,ans_y);
return ans_y.f;
};
for (int i: tri_inds) check_sol(i);
// int lo = 0, hi = sz(tri_inds)-1;
// dbg("BOUNDS",points,lo,hi);
// while (lo < hi) {
// int mid = (lo+hi)/2;
// // dbg("TRYING",mid);
// int x = tri_inds.at(mid);
// ll len = check_sol(x);
// // dbg(x,len,get_len(pref_square[x]));
// if (len > get_len(pref_square.at(x))) lo = mid+1;
// else hi = mid-1;
// }
}
}
tcT> void rot(T& p) {
p = mp(-p.s,p.f);
// fassert(abs(p.f) <= BIG && abs(p.s) <= BIG)
}
int main() {
setIO(); re(N,K);
points.rsz(N); re(points);
ans.f = 2*MOD;
rep(4) {
solve();
each(t,points) rot(t);
each(t,ans.s) rot(t.f), rot(t.s);
}
each(t,ans.s) {
pl a = t.f;
pl b = t.s;
order(a.f,b.f);
order(a.s,b.s);
assert(b.f-a.f == b.s-a.s);
assert(abs(a.f) <= BIG);
assert(abs(a.s) <= BIG);
ps(a.f,a.s,b.f-a.f);
}
// you should actually read the stuff at the bottom
}
/* stuff you should look for
* int overflow, array bounds
* special cases (n=1?)
* do smth instead of nothing and stay organized
* WRITE STUFF DOWN
* DON'T GET STUCK ON ONE APPROACH
*/
Compilation message
izvanzemaljci.cpp: In function 'void FileIO::setIn(str)':
izvanzemaljci.cpp:245:30: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
245 | void setIn(str s) { freopen(s.c_str(),"r",stdin); }
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
izvanzemaljci.cpp: In function 'void FileIO::setOut(str)':
izvanzemaljci.cpp:246:30: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
246 | void setOut(str s) { freopen(s.c_str(),"w",stdout); }
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
204 KB |
Output is correct |
| 2 |
Correct |
1 ms |
204 KB |
Output is correct |
| 3 |
Correct |
1 ms |
204 KB |
Output is correct |
| 4 |
Correct |
0 ms |
204 KB |
Output is correct |
| 5 |
Correct |
1 ms |
204 KB |
Output is correct |
| 6 |
Correct |
0 ms |
204 KB |
Output is correct |
| 7 |
Correct |
99 ms |
13808 KB |
Output is correct |
| 8 |
Correct |
105 ms |
13808 KB |
Output is correct |
| 9 |
Correct |
103 ms |
13800 KB |
Output is correct |
| 10 |
Correct |
115 ms |
13836 KB |
Output is correct |
| 11 |
Correct |
105 ms |
13816 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
204 KB |
Output is correct |
| 2 |
Correct |
1 ms |
204 KB |
Output is correct |
| 3 |
Correct |
1 ms |
204 KB |
Output is correct |
| 4 |
Correct |
1 ms |
204 KB |
Output is correct |
| 5 |
Correct |
1 ms |
204 KB |
Output is correct |
| 6 |
Correct |
1 ms |
204 KB |
Output is correct |
| 7 |
Correct |
0 ms |
204 KB |
Output is correct |
| 8 |
Correct |
1 ms |
204 KB |
Output is correct |
| 9 |
Correct |
1 ms |
204 KB |
Output is correct |
| 10 |
Correct |
157 ms |
13800 KB |
Output is correct |
| 11 |
Correct |
150 ms |
13824 KB |
Output is correct |
| 12 |
Correct |
145 ms |
13816 KB |
Output is correct |
| 13 |
Correct |
146 ms |
13820 KB |
Output is correct |
| 14 |
Correct |
157 ms |
13832 KB |
Output is correct |
| 15 |
Correct |
153 ms |
13812 KB |
Output is correct |
| 16 |
Correct |
143 ms |
13872 KB |
Output is correct |
| 17 |
Correct |
137 ms |
13016 KB |
Output is correct |
| 18 |
Correct |
127 ms |
12724 KB |
Output is correct |
| 19 |
Correct |
116 ms |
11968 KB |
Output is correct |
| 20 |
Correct |
122 ms |
12532 KB |
Output is correct |
| 21 |
Correct |
172 ms |
13840 KB |
Output is correct |
| 22 |
Correct |
154 ms |
13844 KB |
Output is correct |
| 23 |
Correct |
141 ms |
13836 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
204 KB |
Output is correct |
| 2 |
Correct |
0 ms |
204 KB |
Output is correct |
| 3 |
Correct |
0 ms |
204 KB |
Output is correct |
| 4 |
Correct |
1 ms |
204 KB |
Output is correct |
| 5 |
Correct |
0 ms |
204 KB |
Output is correct |
| 6 |
Correct |
1 ms |
204 KB |
Output is correct |
| 7 |
Correct |
1 ms |
204 KB |
Output is correct |
| 8 |
Correct |
1 ms |
204 KB |
Output is correct |
| 9 |
Incorrect |
1 ms |
204 KB |
Output isn't correct |
| 10 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
364 ms |
552 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
355 ms |
536 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
