oj.uz

Submission #246701

# Submission time Handle Problem Language Result Execution time Memory
246701 2020-07-09T23:09:17 Z rqi Tropical Garden (IOI11_garden) C++14
100 / 100
 219 ms 57976 KB 
#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]);
	}
}

Compilation message

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
49.0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 28672 KB Output is correct
2 Correct 22 ms 28672 KB Output is correct
3 Correct 23 ms 28672 KB Output is correct
4 Correct 23 ms 28416 KB Output is correct
5 Correct 21 ms 28544 KB Output is correct
6 Correct 21 ms 28800 KB Output is correct
7 Correct 21 ms 28544 KB Output is correct
8 Correct 21 ms 28672 KB Output is correct
9 Correct 23 ms 28928 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 28672 KB Output is correct
2 Correct 22 ms 28672 KB Output is correct
3 Correct 23 ms 28672 KB Output is correct
4 Correct 23 ms 28416 KB Output is correct
5 Correct 21 ms 28544 KB Output is correct
6 Correct 21 ms 28800 KB Output is correct
7 Correct 21 ms 28544 KB Output is correct
8 Correct 21 ms 28672 KB Output is correct
9 Correct 23 ms 28928 KB Output is correct
10 Correct 20 ms 28544 KB Output is correct
11 Correct 33 ms 30848 KB Output is correct
12 Correct 53 ms 32376 KB Output is correct
13 Correct 94 ms 48880 KB Output is correct
14 Correct 219 ms 41148 KB Output is correct
15 Correct 183 ms 41952 KB Output is correct
16 Correct 195 ms 39160 KB Output is correct
17 Correct 128 ms 38012 KB Output is correct
18 Correct 55 ms 33016 KB Output is correct
19 Correct 146 ms 42896 KB Output is correct
20 Correct 178 ms 43640 KB Output is correct
21 Correct 144 ms 40440 KB Output is correct
22 Correct 124 ms 39288 KB Output is correct
23 Correct 163 ms 44152 KB Output is correct

Subtask #3
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 28672 KB Output is correct
2 Correct 22 ms 28672 KB Output is correct
3 Correct 23 ms 28672 KB Output is correct
4 Correct 23 ms 28416 KB Output is correct
5 Correct 21 ms 28544 KB Output is correct
6 Correct 21 ms 28800 KB Output is correct
7 Correct 21 ms 28544 KB Output is correct
8 Correct 21 ms 28672 KB Output is correct
9 Correct 23 ms 28928 KB Output is correct
10 Correct 20 ms 28544 KB Output is correct
11 Correct 33 ms 30848 KB Output is correct
12 Correct 53 ms 32376 KB Output is correct
13 Correct 94 ms 48880 KB Output is correct
14 Correct 219 ms 41148 KB Output is correct
15 Correct 183 ms 41952 KB Output is correct
16 Correct 195 ms 39160 KB Output is correct
17 Correct 128 ms 38012 KB Output is correct
18 Correct 55 ms 33016 KB Output is correct
19 Correct 146 ms 42896 KB Output is correct
20 Correct 178 ms 43640 KB Output is correct
21 Correct 144 ms 40440 KB Output is correct
22 Correct 124 ms 39288 KB Output is correct
23 Correct 163 ms 44152 KB Output is correct
24 Correct 23 ms 28544 KB Output is correct
25 Correct 35 ms 31104 KB Output is correct
26 Correct 53 ms 33016 KB Output is correct
27 Correct 87 ms 49912 KB Output is correct
28 Correct 148 ms 42976 KB Output is correct
29 Correct 171 ms 43768 KB Output is correct
30 Correct 140 ms 40696 KB Output is correct
31 Correct 127 ms 39416 KB Output is correct
32 Correct 57 ms 33016 KB Output is correct
33 Correct 142 ms 42744 KB Output is correct
34 Correct 172 ms 43768 KB Output is correct
35 Correct 144 ms 40440 KB Output is correct
36 Correct 134 ms 39416 KB Output is correct
37 Correct 160 ms 44028 KB Output is correct
38 Correct 153 ms 57976 KB Output is correct