oj.uz

Submission #303722

# Submission time Handle Problem Language Result Execution time Memory
303722 2020-09-20T15:12:09 Z Benq Counting Mushrooms (IOI20_mushrooms) C++14
92.2449 / 100
 15 ms 504 KB 
#include "mushrooms.h"

#include <bits/stdc++.h>
using namespace std;
 
using ll = long long;
using ld = long double;
using db = double; 
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
// ^ 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>; 

// pairs
#define mp make_pair
#define f first
#define s second

// vectors
#define sz(x) (int)(x).size()
#define all(x) begin(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 pf push_front 
#define pb push_back
#define eb emplace_back 
#define lb lower_bound 
#define ub upper_bound 

// 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 trav(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 ld PI = acos((ld)-1);
const int xd[4] = {1,0,-1,0}, yd[4] = {0,1,0,-1}; // for every grid problem!!
mt19937 rng((uint32_t)chrono::steady_clock::now().time_since_epoch().count()); 

// helper funcs
constexpr int pct(int x) { return __builtin_popcount(x); } // # of bits set
constexpr int bits(int x) { return 31-__builtin_clz(x); } // floor(log2(x)) 
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; }

#define tcTU tcT, class U
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(u); } // element that doesn't exist from (multi)set

// INPUT
#define tcTUU tcT, class ...U
tcT> void re(complex<T>& c);
tcTU> void re(pair<T,U>& p);
tcT> void re(vector<T>& v);
tcT, size_t SZ> void re(AR<T,SZ>& a);

tcT> 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); }
tcTUU> void re(T& t, U&... u) { re(t); re(u...); }

tcT> void re(complex<T>& c) { T a,b; re(a,b); c = {a,b}; }
tcTU> void re(pair<T,U>& p) { re(p.f,p.s); }
tcT> void re(vector<T>& x) { trav(a,x) re(a); }
tcT, size_t SZ> void re(AR<T,SZ>& x) { trav(a,x) re(a); }

// TO_STRING
#define ts to_string
str ts(char c) { return str(1,c); }
str ts(const char* s) { return (str)s; }
str ts(str s) { return s; }
str ts(bool b) { 
	#ifdef LOCAL
		return b ? "true" : "false"; 
	#else 
		return ts((int)b);
	#endif
}
tcT> str ts(complex<T> 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; }
tcTU> str ts(pair<T,U> p);
tcT> str ts(T v) { // containers with begin(), end()
	#ifdef LOCAL
		bool fst = 1; str res = "{";
		for (const auto& x: v) {
			if (!fst) res += ", ";
			fst = 0; res += ts(x);
		}
		res += "}"; return res;
	#else
		bool fst = 1; str res = "";
		for (const auto& x: v) {
			if (!fst) res += " ";
			fst = 0; res += ts(x);
		}
		return res;

	#endif
}
tcTU> str ts(pair<T,U> p) {
	#ifdef LOCAL
		return "("+ts(p.f)+", "+ts(p.s)+")"; 
	#else
		return ts(p.f)+" "+ts(p.s);
	#endif
}

// OUTPUT
tcT> void pr(T x) { cout << ts(x); }
tcTUU> void pr(const T& t, const U&... u) { 
	pr(t); pr(u...); }
void ps() { pr("\n"); } // print w/ spaces
tcTUU> void ps(const T& t, const U&... u) { 
	pr(t); if (sizeof...(u)) pr(" "); ps(u...); }

// DEBUG
void DBG() { cerr << "]" << endl; }
tcTUU> void DBG(const T& t, const U&... u) {
	cerr << ts(t); if (sizeof...(u)) cerr << ", ";
	DBG(u...); }
#ifdef LOCAL // compile with -DLOCAL, chk -> fake assert
	#define dbg(...) cerr << "Line(" << __LINE__ << ") -> [" << #__VA_ARGS__ << "]: [", DBG(__VA_ARGS__)
	#define chk(...) if (!(__VA_ARGS__)) cerr << "Line(" << __LINE__ << ") -> function(" \
		 << __FUNCTION__  << ") -> CHK FAILED: (" << #__VA_ARGS__ << ")" << "\n", exit(0);
#else
	#define dbg(...) 0
	#define chk(...) 0
#endif

// FILE I/O
void setIn(str s) { freopen(s.c_str(),"r",stdin); }
void setOut(str s) { freopen(s.c_str(),"w",stdout); }
void unsyncIO() { cin.tie(0)->sync_with_stdio(0); }
void setIO(str 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
}

int count_mushrooms(int n) {
	// std::vector<int> m;
	V<vi> oops = {{0},{}};
	int i = 1; // x+20000/x
	while (i < n && sz(oops[0]) < 2 && sz(oops[1]) < 2) {
		int col = use_machine({0,i});
		oops[col].pb(i); i ++;
	}
	// dbg(oops[0],oops[1]);
	int num = 0;
	while (i <= n-2 && (sz(oops[0]) < 100 && sz(oops[1]) < 100)) {
		// assert(sz(oops[0]) >= 2);
		if (sz(oops[0]) >= 2) {
			vi v = {oops[0][0],i,oops[0][1],i+1};
			int x = use_machine(v);
			if (x&2) oops[1].pb(i);
			else oops[0].pb(i);
			if (x&1) oops[1].pb(i+1);
			else oops[0].pb(i+1);
		} else {
			vi v = {oops[1][0],i,oops[1][1],i+1};
			int x = use_machine(v);
			if (x&2) oops[0].pb(i);
			else oops[1].pb(i);
			if (x&1) oops[0].pb(i+1);
			else oops[1].pb(i+1);
		}
		i += 2;
		num ++;
	}
	int ans = sz(oops[0]);
	while (i < n) {
		int tri = sz(oops[0]) < sz(oops[1]);
		int I = i; while (i < n && i-I < sz(oops[tri])) i ++;
		vi tmp;
		FOR(j,I,i) {
			tmp.pb(oops[tri][j-I]);
			tmp.pb(j);
		}
		int cur = use_machine(tmp);
		if (tri == 0) {
			int ones = (cur+1)/2;
			ans += i-I-ones;
			oops[cur&1].pb(i-1);
		} else {
			int zeros = (cur+1)/2;
			ans += zeros;
			oops[!(cur&1)].pb(i-1);
		}
	}
	return ans;
}


// int count_mushrooms(int n) {
// 	// std::vector<int> m;
// 	vi col(n,-1); col[0] = 0;
// 	vi cnt = {1,0};
// 	int i = 1; // 2*x+20000/x
// 	// x = 100
// 	// dbg(n);
// 	while (i < n && cnt[0] < 100 && cnt[1] < 100) {
// 		col[i] = use_machine({0,i});
// 		// dbg("OOPS",i,col[i]);
// 		cnt[col[i]] ++;
// 		i ++;
// 	}
// 	// dbg("BAD",i,cnt[0],cnt[1]);
// 	// dbg("OK");
// 	int tri = cnt[0] < cnt[1];
// 	vi res; F0R(j,i) if (col[j] == tri) res.pb(j);
// 	while (i < n) {
// 		int I = i; while (i < n && i-I < sz(res)) i ++;
// 		vi tmp;
// 		FOR(j,I,i) {
// 			tmp.pb(res[j-I]);
// 			tmp.pb(j);
// 		}
// 		// dbg("HA",I,i,tmp);
// 		int ans = use_machine(tmp);
// 		if (tri == 0) {
// 			int ones = (ans+1)/2;
// 			cnt[0] += i-I-ones;
// 		} else {
// 			cnt[0] += (ans+1)/2;
// 		}
// 	}
// 	return cnt[0];
// }

Compilation message

mushrooms.cpp: In function 'void setIn(str)':
mushrooms.cpp:184:28: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
  184 | void setIn(str s) { freopen(s.c_str(),"r",stdin); }
      |                     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
mushrooms.cpp: In function 'void setOut(str)':
mushrooms.cpp:185:29: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
  185 | void setOut(str s) { freopen(s.c_str(),"w",stdout); }
      |                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
92.2449 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 1 ms 256 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 10 ms 384 KB Output is correct
8 Correct 9 ms 256 KB Output is correct
9 Correct 8 ms 372 KB Output is correct
10 Correct 10 ms 384 KB Output is correct
11 Partially correct 10 ms 388 KB Output is partially correct
12 Correct 11 ms 384 KB Output is correct
13 Correct 11 ms 384 KB Output is correct
14 Correct 4 ms 384 KB Output is correct
15 Partially correct 11 ms 392 KB Output is partially correct
16 Partially correct 8 ms 384 KB Output is partially correct
17 Correct 9 ms 396 KB Output is correct
18 Correct 10 ms 384 KB Output is correct
19 Partially correct 8 ms 384 KB Output is partially correct
20 Correct 9 ms 384 KB Output is correct
21 Correct 9 ms 384 KB Output is correct
22 Partially correct 9 ms 380 KB Output is partially correct
23 Correct 9 ms 384 KB Output is correct
24 Correct 4 ms 392 KB Output is correct
25 Partially correct 13 ms 384 KB Output is partially correct
26 Partially correct 12 ms 384 KB Output is partially correct
27 Partially correct 10 ms 388 KB Output is partially correct
28 Partially correct 8 ms 384 KB Output is partially correct
29 Partially correct 10 ms 384 KB Output is partially correct
30 Partially correct 9 ms 388 KB Output is partially correct
31 Partially correct 9 ms 384 KB Output is partially correct
32 Partially correct 7 ms 384 KB Output is partially correct
33 Partially correct 11 ms 384 KB Output is partially correct
34 Partially correct 6 ms 388 KB Output is partially correct
35 Partially correct 9 ms 384 KB Output is partially correct
36 Partially correct 12 ms 384 KB Output is partially correct
37 Partially correct 9 ms 384 KB Output is partially correct
38 Partially correct 8 ms 288 KB Output is partially correct
39 Partially correct 10 ms 384 KB Output is partially correct
40 Partially correct 15 ms 384 KB Output is partially correct
41 Partially correct 6 ms 380 KB Output is partially correct
42 Partially correct 10 ms 384 KB Output is partially correct
43 Partially correct 9 ms 504 KB Output is partially correct
44 Partially correct 8 ms 384 KB Output is partially correct
45 Partially correct 8 ms 384 KB Output is partially correct
46 Partially correct 8 ms 308 KB Output is partially correct
47 Partially correct 9 ms 384 KB Output is partially correct
48 Partially correct 9 ms 384 KB Output is partially correct
49 Partially correct 9 ms 384 KB Output is partially correct
50 Partially correct 9 ms 384 KB Output is partially correct
51 Partially correct 9 ms 384 KB Output is partially correct
52 Partially correct 7 ms 384 KB Output is partially correct
53 Partially correct 8 ms 388 KB Output is partially correct
54 Partially correct 8 ms 384 KB Output is partially correct
55 Partially correct 11 ms 392 KB Output is partially correct
56 Partially correct 9 ms 388 KB Output is partially correct
57 Partially correct 7 ms 384 KB Output is partially correct
58 Partially correct 10 ms 388 KB Output is partially correct
59 Partially correct 13 ms 384 KB Output is partially correct
60 Partially correct 14 ms 384 KB Output is partially correct
61 Partially correct 13 ms 388 KB Output is partially correct
62 Correct 1 ms 256 KB Output is correct
63 Correct 1 ms 416 KB Output is correct
64 Correct 0 ms 256 KB Output is correct
65 Correct 1 ms 384 KB Output is correct
66 Correct 1 ms 256 KB Output is correct
67 Correct 1 ms 256 KB Output is correct
68 Correct 1 ms 256 KB Output is correct
69 Correct 1 ms 256 KB Output is correct
70 Correct 1 ms 256 KB Output is correct
71 Correct 1 ms 384 KB Output is correct
72 Correct 0 ms 256 KB Output is correct
73 Correct 1 ms 256 KB Output is correct
74 Correct 0 ms 256 KB Output is correct
75 Correct 1 ms 384 KB Output is correct
76 Correct 1 ms 384 KB Output is correct
77 Correct 1 ms 256 KB Output is correct
78 Correct 1 ms 384 KB Output is correct
79 Correct 1 ms 384 KB Output is correct
80 Correct 1 ms 256 KB Output is correct
81 Correct 1 ms 384 KB Output is correct
82 Correct 1 ms 256 KB Output is correct
83 Correct 1 ms 256 KB Output is correct
84 Correct 1 ms 384 KB Output is correct
85 Correct 1 ms 256 KB Output is correct
86 Correct 1 ms 256 KB Output is correct
87 Correct 1 ms 256 KB Output is correct
88 Correct 1 ms 256 KB Output is correct
89 Correct 1 ms 256 KB Output is correct
90 Correct 0 ms 256 KB Output is correct
91 Correct 1 ms 256 KB Output is correct