제출 #246701

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
246701		rqi	열대 식물원 (Tropical Garden) (IOI11_garden)	C++14	100 / 100	219 ms	57976 KiB

garden

#include "garden.h"
#include "gardenlib.h"
#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 = 2e5+5; 
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; } 
int pct(int x) { return __builtin_popcount(x); } 
int bits(int x) { return 31-__builtin_clz(x); } // floor(log2(x)) 
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;
}
 
// 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
}
 
const int mx = 400005;
int N, M;
vpi elist[mx];
int to[mx];
vi from[mx];
int Q;
int G[mx];
int ans[mx];
int dists[mx];
vi rem[mx];
 
void dfs(int node, int dist, int start){
	if(node < N){
		dists[node] = dist;
	}
	for(auto u: from[node]){
		if(u == start) continue;
		dfs(u, dist+1, start);
	}
}
 
void solve(int node){
	//ps("solve", node);
	int curnode = node;
	int cyc = 0;
	for(int i = 0; i < 2*N+1; i++){
		cyc++;
		curnode = to[curnode];
		if(node == curnode) break;
	}

	if(cyc == 2*N+1){
		cyc = MOD;
	}

	for(int i = 0; i < N; i++){
		dists[i] = MOD;
	}
 
	dfs(node, 0, node);
 
	map<int, vi> m;
	//ps("cyc", cyc);
	for(int i = 0; i < min(cyc, 150005); i++){
		rem[i].clear();
	}
	for(int i = 0; i < N; i++){
		//ps(i, dists[i]);
		if(dists[i] != MOD) rem[dists[i] % cyc].pb(dists[i]);
	}
 
	for(int i = 0; i < min(cyc, 150005); i++){
		sort(all(rem[i]));
	}
 	
 	//what if G[i] and cyc are big?

	for(int i = 0; i < Q; i++){
		if(G[i] % cyc >= 2*N) continue;
		if(sz(rem[G[i] % cyc]) == 0) continue;
		if(rem[G[i] % cyc][0] > G[i]) continue;
 		
		int lo = 0;
		int hi = sz(rem[G[i] % cyc])-1;
		while(lo < hi){
			int mid = (lo+hi)/2+1;
			if(rem[G[i] % cyc][mid] <= G[i]){
				lo = mid;
			}
			else hi = mid-1;
		}
		//ps(rem[G[i] % cyc], sz(rem[G[i] % cyc])-lo);
		ans[i]+=lo+1;
	}
}
 
void count_routes(int _N, int _M, int P, int R[][2], int _Q, int _G[]){
	N = _N;
	M = _M;
	Q = _Q;
	for(int i = 0; i < Q; i++){
		G[i] = _G[i];
	}
	for(int i = 0; i < M; i++){
		elist[R[i][0]].pb(mp(i, R[i][1]));
		elist[R[i][1]].pb(mp(i, R[i][0]));
	}
 
	for(int i = 0; i < N; i++){
		vi nodes;
		if(sz(elist[i]) == 1){
			nodes.pb(elist[i][0].s);
			nodes.pb(elist[i][0].s);
		}
		else{
			nodes.pb(elist[i][0].s);
			nodes.pb(elist[i][1].s);
		}
		for(int j = 0; j < 2; j++){
			int t = 0;
			if(elist[nodes[j]][0].s == i){
				t = 1;
			}
			to[i+j*N] = nodes[j]+t*N;
			//ps(i+j*N, to[i+j*N]);
		}
	}
 
	for(int i = 0; i < 2*N; i++){
		from[to[i]].pb(i);
	}
 
	//search for cycles with P, P+N
	solve(P); 
	solve(P+N);
 
	for(int i = 0; i < Q; i++){
		answer(ans[i]);
	}
}

컴파일 시 표준 에러 (stderr) 메시지

garden.cpp: In function 'void setIn(std::__cxx11::string)':
garden.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); }
                        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
garden.cpp: In function 'void setOut(std::__cxx11::string)':
garden.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); }
                         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 49 / 49
• Subtask 2: 20 / 20
• Subtask 3: 31 / 31