Submission #242471

#TimeUsernameProblemLanguageResultExecution timeMemory
242471BenqGolf (JOI17_golf)C++14
30 / 100
10096 ms18876 KiB
#include <bits/stdc++.h> using namespace std; typedef long long ll; typedef long double ld; typedef double db; typedef string str; typedef pair<int,int> pi; typedef pair<ll,ll> pl; typedef pair<db,db> pd; typedef vector<int> vi; typedef vector<ll> vl; typedef vector<db> vd; typedef vector<str> vs; typedef vector<pi> vpi; typedef vector<pl> vpl; typedef vector<pd> vpd; #define mp make_pair #define f first #define s second #define sz(x) (int)x.size() #define all(x) begin(x), end(x) #define rall(x) (x).rbegin(), (x).rend() #define rsz resize #define ins insert #define ft front() #define bk back() #define pf push_front #define pb push_back #define eb emplace_back #define lb lower_bound #define ub upper_bound #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 trav(a,x) for (auto& a: x) const int MOD = 1e9+7; // 998244353; const int MX = 1<<18; const ll INF = 1e18; const ld PI = acos((ld)-1); const int xd[4] = {1,0,-1,0}, yd[4] = {0,1,0,-1}; mt19937 rng((uint32_t)chrono::steady_clock::now().time_since_epoch().count()); template<class T> bool ckmin(T& a, const T& b) { return b < a ? a = b, 1 : 0; } template<class T> bool ckmax(T& a, const T& b) { return a < b ? a = b, 1 : 0; } constexpr int pct(int x) { return __builtin_popcount(x); } constexpr int bits(int x) { return 31-__builtin_clz(x); } // floor(log2(x)) constexpr int cdiv(int a, int b) { return a/b+!(a<0||a%b == 0); } // division of a by b rounded up, assumes b > 0 int fstTrue(function<bool(int)> f, int lo, int hi) { hi ++; assert(lo <= hi); // assuming f is increasing while (lo < hi) { // find first index such that f is true int mid = (lo+hi)/2; f(mid) ? hi = mid : lo = mid+1; } return lo; } template<class T> void remDup(vector<T>& v) { sort(all(v)); v.erase(unique(all(v)),end(v)); } // INPUT template<class A> void re(complex<A>& c); template<class A, class B> void re(pair<A,B>& p); template<class A> void re(vector<A>& v); template<class A, size_t SZ> void re(array<A,SZ>& a); template<class T> void re(T& x) { cin >> x; } void re(db& d) { str t; re(t); d = stod(t); } void re(ld& d) { str t; re(t); d = stold(t); } template<class H, class... T> void re(H& h, T&... t) { re(h); re(t...); } template<class A> void re(complex<A>& c) { A a,b; re(a,b); c = {a,b}; } template<class A, class B> void re(pair<A,B>& p) { re(p.f,p.s); } template<class A> void re(vector<A>& x) { trav(a,x) re(a); } template<class A, size_t SZ> void re(array<A,SZ>& x) { trav(a,x) re(a); } // TO_STRING #define ts to_string str ts(char c) { return str(1,c); } str ts(bool b) { return b ? "true" : "false"; } str ts(const char* s) { return (str)s; } str ts(str s) { return s; } template<class A> str ts(complex<A> c) { stringstream ss; ss << c; return ss.str(); } str ts(vector<bool> v) { str res = "{"; F0R(i,sz(v)) res += char('0'+v[i]); res += "}"; return res; } template<size_t SZ> str ts(bitset<SZ> b) { str res = ""; F0R(i,SZ) res += char('0'+b[i]); return res; } template<class A, class B> str ts(pair<A,B> p); template<class T> str ts(T v) { // containers with begin(), end() bool fst = 1; str res = "{"; for (const auto& x: v) { if (!fst) res += ", "; fst = 0; res += ts(x); } res += "}"; return res; } template<class A, class B> str ts(pair<A,B> p) { return "("+ts(p.f)+", "+ts(p.s)+")"; } // OUTPUT template<class A> void pr(A x) { cout << ts(x); } template<class H, class... T> void pr(const H& h, const T&... t) { pr(h); pr(t...); } void ps() { pr("\n"); } // print w/ spaces template<class H, class... T> void ps(const H& h, const T&... t) { pr(h); if (sizeof...(t)) pr(" "); ps(t...); } // DEBUG void DBG() { cerr << "]" << endl; } template<class H, class... T> void DBG(H h, T... t) { cerr << ts(h); if (sizeof...(t)) cerr << ", "; DBG(t...); } #ifdef LOCAL // compile with -DLOCAL #define dbg(...) cerr << "LINE(" << __LINE__ << ") -> [" << #__VA_ARGS__ << "]: [", DBG(__VA_ARGS__) #else #define dbg(...) 0 #endif // FILE I/O void setIn(string s) { freopen(s.c_str(),"r",stdin); } void setOut(string s) { freopen(s.c_str(),"w",stdout); } void unsyncIO() { ios_base::sync_with_stdio(0); cin.tie(0); } void setIO(string s = "") { unsyncIO(); // 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 USACO } bool bet(pi a, int b) { return a.f <= b && b <= a.s; } struct Dat { vector<pair<int,pi>> hor; vector<bool> use; void init(vector<pair<int,pi>> _hor) { hor = _hor; use.rsz(sz(hor)); } vi query(int x, int yl, int yr) { vi res; F0R(i,sz(hor)) if (!use[i] && bet({yl,yr},hor[i].f) && bet(hor[i].s,x)) { res.pb(i); use[i] = 1; } return res; } }; Dat A, B; int S,T,U,V,N; vector<pair<pi,pi>> v; int lo[MX], hi[MX]; vector<pair<int,pi>> hor, ver; void go() { vector<array<int,3>> todo; F0R(i,N) { todo.pb({v[i].f.f,-1,i}); todo.pb({v[i].f.s,1,i}); } map<int,pi> m; m[1] = {1e9,1}; sort(all(todo)); auto ins = [&](int l, int r, int x) { if (l > r) return; while (1) { auto it = m.lb(l); if (it != begin(m) && prev(it)->s.f >= l) it --; if (it == end(m) || it->f > r) break; auto z = *it; m.erase(it); if (z.s.f > r) m[r+1] = z.s; if (z.f < l) m[z.f] = {l-1,z.s.s}; } m[l] = {r,x}; }; auto val = [&](int x) { return prev(m.ub(x))->s.s; }; trav(t,todo) { int i = t[2]; if (t[1] == -1) { lo[i] = val(v[i].s.f); hi[i] = val(v[i].s.s); // dbg(i,lo[i],hi[i]); } else { ins(v[i].s.f+1,v[i].s.s-1,t[0]); } } m.clear(); m[1] = {1e9,1e9}; reverse(all(todo)); trav(t,todo) { //dbg("DOING",t,m); int i = t[2]; if (t[1] == 1) { int LO = v[i].s.f, HI = v[i].s.s; //dbg("AH",val(LO),val(HI)); hor.pb({LO,{lo[i],val(LO)}}); hor.pb({HI,{hi[i],val(HI)}}); // dbg(i,lo[i],hi[i]); // dbg(hor); } else { ins(v[i].s.f+1,v[i].s.s-1,t[0]); } } //dbg(m); } void swa() { swap(hor,ver); trav(t,v) swap(t.f,t.s); swap(S,T), swap(U,V); } void compress() { vi y; trav(t,hor) y.pb(t.f); trav(t,ver) y.pb(t.s.f), y.pb(t.s.s); remDup(y); auto proc = [&y](int& x) { x = lb(all(y),x)-begin(y); }; proc(T), proc(V); trav(t,hor) proc(t.f); trav(t,ver) proc(t.s.f), proc(t.s.s); } int dist[2][MX]; bool conVer(int a, pi b) { return ver[a].f == b.f && bet(ver[a].s,b.s); } bool conHor(int a, pi b) { return hor[a].f == b.s && bet(hor[a].s,b.f); } void fin(int x) { ps(x); exit(0); } int main() { setIO(); re(S,T,U,V,N); v.rsz(N); re(v); v.pb({{S,S},{T,T}}); v.pb({{U,U},{V,V}}); N += 2; //dbg(v); go(); swa(); go(); swa(); remDup(hor), remDup(ver); compress(); swa(); compress(); swa(); // dbg(hor); // dbg(ver); // dbg(S,T); // dbg(U,V); A.init(ver), B.init(hor); queue<pi> q; F0R(i,sz(ver)) dist[0][i] = MOD; F0R(i,sz(hor)) dist[1][i] = MOD; auto ad = [&](int a, int b, int c) { if (dist[a][b] != MOD) return; dist[a][b] = c; q.push({a,b}); }; F0R(i,sz(ver)) if (conVer(i,{S,T})) ad(0,i,1); F0R(i,sz(hor)) if (conHor(i,{S,T})) ad(1,i,1); while (sz(q)) { pi a = q.ft; q.pop(); if (a.f == 0) { if (conVer(a.s,{U,V})) fin(dist[a.f][a.s]); // vertical vi v = B.query(ver[a.s].f, ver[a.s].s.f, ver[a.s].s.s); trav(t,v) ad(1,t,dist[a.f][a.s]+1); } else { if (conHor(a.s,{U,V})) fin(dist[a.f][a.s]); vi v = A.query(hor[a.s].f,hor[a.s].s.f,hor[a.s].s.s); trav(t,v) ad(0,t,dist[a.f][a.s]+1); } } // 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 */

Compilation message (stderr)

golf.cpp: In function 'void setIn(std::__cxx11::string)':
golf.cpp:130:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
 void setIn(string s) { freopen(s.c_str(),"r",stdin); }
                        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
golf.cpp: In function 'void setOut(std::__cxx11::string)':
golf.cpp:131:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
 void setOut(string s) { freopen(s.c_str(),"w",stdout); }
                         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
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