oj.uz

Submission #765703

# Submission time Handle Problem Language Result Execution time Memory
765703 2023-06-25T03:27:22 Z marvinthang The Big Prize (IOI17_prize) C++17
100 / 100
 52 ms 10864 KB 
/*************************************
*    author: marvinthang             *
*    created: 25.06.2023 08:50:11    *
*************************************/

#include "prize.h"
#include <bits/stdc++.h>

using namespace std;

#define                  fi  first
#define                  se  second
#define                left  ___left
#define               right  ___right
#define                TIME  (1.0 * clock() / CLOCKS_PER_SEC)
#define             MASK(i)  (1LL << (i))
#define           BIT(x, i)  ((x) >> (i) & 1)
#define  __builtin_popcount  __builtin_popcountll
#define              ALL(v)  (v).begin(), (v).end()
#define           REP(i, n)  for (int i = 0, _n = (n); i < _n; ++i)
#define          REPD(i, n)  for (int i = (n); i--; )
#define        FOR(i, a, b)  for (int i = (a), _b = (b); i < _b; ++i) 
#define       FORD(i, b, a)  for (int i = (b), _a = (a); --i >= _a; ) 
#define       FORE(i, a, b)  for (int i = (a), _b = (b); i <= _b; ++i) 
#define      FORDE(i, b, a)  for (int i = (b), _a = (a); i >= _a; --i) 
#define        scan_op(...)  istream & operator >> (istream &in, __VA_ARGS__ &u)
#define       print_op(...)  ostream & operator << (ostream &out, const __VA_ARGS__ &u)
#ifdef LOCAL
    #include "debug.h"
#else
    #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
    #define DB(...) 23
    #define db(...) 23
    #define debug(...) 23
#endif

template <class U, class V> scan_op(pair <U, V>)  { return in >> u.first >> u.second; }
template <class T> scan_op(vector <T>)  { for (size_t i = 0; i < u.size(); ++i) in >> u[i]; return in; }
template <class U, class V> print_op(pair <U, V>)  { return out << '(' << u.first << ", " << u.second << ')'; }
template <size_t i, class T> ostream & print_tuple_utils(ostream &out, const T &tup) { if constexpr(i == tuple_size<T>::value) return out << ")";  else return print_tuple_utils<i + 1, T>(out << (i ? ", " : "(") << get<i>(tup), tup); }
template <class ...U> print_op(tuple<U...>) { return print_tuple_utils<0, tuple<U...>>(out, u); }
template <class Con, class = decltype(begin(declval<Con>()))> typename enable_if <!is_same<Con, string>::value, ostream&>::type operator << (ostream &out, const Con &con) { out << '{'; for (__typeof(con.begin()) it = con.begin(); it != con.end(); ++it) out << (it == con.begin() ? "" : ", ") << *it; return out << '}'; }
template <class A, class B> bool minimize(A &a, B b)  { if (a > b) { a = b; return true; } return false; }
template <class A, class B> bool maximize(A &a, B b)  { if (a < b) { a = b; return true; } return false; }

// end of template

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count()); 
template <class T> T rand(T l, T h) { return uniform_int_distribution <T> (l, h) (rng); } 
template <class T> T rand(T h) { return uniform_int_distribution <T> (0, h - 1) (rng); } 

int res;
vector <set <int>> ss;
vector <int> cnt_left;

void solve(int l, int r) {
	if (~res || l > r) return;
	int m = l + r >> 1;
	vector <int> a = ask(m);
	cnt_left[m] = a[0];
	int sum = a[0] + a[1];
	if (!sum) {
		res = m;
		return;
	}
	auto it = ss[sum].insert(m).fi;
	if (it == ss[sum].begin()) {
		if (a[0]) solve(l, m - 1);
	} else {
		if (cnt_left[*prev(it)] < a[0]) solve(l, m - 1);
	}
	if (~res) return;
	if (++it != ss[sum].end()) {
		if (cnt_left[*it] > a[0]) solve(m + 1, r);
	} else {
		if (a[1]) solve(m + 1, r);
	}
}

int find_best(int n) {
	res = -1;
	ss.assign(n, set<int>());
	cnt_left.assign(n, -1);
	solve(0, n - 1);
	return res;
}

#ifdef LOCAL
#include "prize.h"

#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

static const int max_q = 5000;
static int n;
static int query_count = 0;
static vector<int> g;
static vector<vector<int> > rank_count;

vector<int> ask(int i) {
	query_count++;
	if(query_count > max_q) {
		cerr << "Query limit exceeded" << endl;
		exit(0);
	}

	if(i < 0 || i >= n) {
		cerr << "Bad index: " << i << endl;
		exit(0);
	}

	vector<int> res(2);
	res[0] = rank_count[g[i] - 1][i + 1];
	res[1] = rank_count[g[i] - 1][n] - res[0];
	return res;
}

int main() {
	file("prize");
	cin >> n;

	g.resize(n);
	for(int i = 0; i < n; i++) {
		cin >> g[i];
		if(g[i] < 1) {
			cerr << "Invalid rank " << g[i] << " at index " << i << endl;
			exit(0);
		}
	}

	int max_rank = *max_element(g.begin(), g.end());

	rank_count.resize(max_rank + 1, vector<int>(n + 1, 0));
	for(int r = 0; r <= max_rank; r++) {
		for(int i = 1; i <= n; i++) {
			rank_count[r][i] = rank_count[r][i - 1];
			if(g[i - 1] == r)
			  rank_count[r][i]++;
		}
	}

	for(int i = 0; i <= n; i++)
		for(int r = 1; r <= max_rank; r++)
			rank_count[r][i] += rank_count[r - 1][i];

	int res = find_best(n);
	if (g[res] != 1) return !(cout << "WA!\n");
	cout << res << endl << "Query count: " << query_count << endl;

	return 0;
}
#endif

Compilation message

prize.cpp: In function 'void solve(int, int)':
prize.cpp:58:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   58 |  int m = l + r >> 1;
      |          ~~^~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 10412 KB Output is correct
2 Correct 5 ms 10404 KB Output is correct
3 Correct 6 ms 10404 KB Output is correct
4 Correct 5 ms 10448 KB Output is correct
5 Correct 5 ms 10448 KB Output is correct
6 Correct 5 ms 10448 KB Output is correct
7 Correct 5 ms 10408 KB Output is correct
8 Correct 5 ms 10480 KB Output is correct
9 Correct 5 ms 10408 KB Output is correct
10 Correct 5 ms 10448 KB Output is correct

Subtask #2
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 10448 KB Output is correct
2 Correct 6 ms 10448 KB Output is correct
3 Correct 5 ms 10540 KB Output is correct
4 Correct 5 ms 10448 KB Output is correct
5 Correct 5 ms 10448 KB Output is correct
6 Correct 5 ms 10412 KB Output is correct
7 Correct 5 ms 10408 KB Output is correct
8 Correct 6 ms 10448 KB Output is correct
9 Correct 5 ms 10448 KB Output is correct
10 Correct 5 ms 10448 KB Output is correct
11 Correct 6 ms 10504 KB Output is correct
12 Correct 5 ms 10404 KB Output is correct
13 Correct 8 ms 10448 KB Output is correct
14 Correct 3 ms 1360 KB Output is correct
15 Correct 10 ms 10456 KB Output is correct
16 Correct 37 ms 10584 KB Output is correct
17 Correct 5 ms 10412 KB Output is correct
18 Correct 21 ms 10700 KB Output is correct
19 Correct 6 ms 10408 KB Output is correct
20 Correct 7 ms 5456 KB Output is correct
21 Correct 16 ms 10528 KB Output is correct
22 Correct 7 ms 10448 KB Output is correct
23 Correct 5 ms 10448 KB Output is correct
24 Correct 6 ms 10408 KB Output is correct
25 Correct 26 ms 10568 KB Output is correct
26 Correct 21 ms 10564 KB Output is correct
27 Correct 5 ms 10448 KB Output is correct
28 Correct 32 ms 10608 KB Output is correct
29 Correct 17 ms 10676 KB Output is correct
30 Correct 47 ms 10656 KB Output is correct
31 Correct 5 ms 10404 KB Output is correct
32 Correct 7 ms 10508 KB Output is correct
33 Correct 0 ms 208 KB Output is correct
34 Correct 10 ms 10528 KB Output is correct
35 Correct 6 ms 10408 KB Output is correct
36 Correct 9 ms 10524 KB Output is correct
37 Correct 5 ms 10500 KB Output is correct
38 Correct 7 ms 10484 KB Output is correct
39 Correct 12 ms 10572 KB Output is correct
40 Correct 20 ms 10656 KB Output is correct
41 Correct 29 ms 10568 KB Output is correct
42 Correct 15 ms 10600 KB Output is correct
43 Correct 24 ms 10568 KB Output is correct
44 Correct 17 ms 10532 KB Output is correct
45 Correct 14 ms 10512 KB Output is correct
46 Correct 5 ms 10388 KB Output is correct
47 Correct 21 ms 10496 KB Output is correct
48 Correct 32 ms 10616 KB Output is correct
49 Correct 8 ms 10428 KB Output is correct
50 Correct 45 ms 10576 KB Output is correct
51 Correct 20 ms 10508 KB Output is correct
52 Correct 6 ms 10420 KB Output is correct
53 Correct 6 ms 10500 KB Output is correct
54 Correct 12 ms 10552 KB Output is correct
55 Correct 5 ms 10456 KB Output is correct
56 Correct 21 ms 10688 KB Output is correct
57 Correct 31 ms 10632 KB Output is correct
58 Correct 25 ms 10568 KB Output is correct
59 Correct 27 ms 10528 KB Output is correct
60 Correct 27 ms 10528 KB Output is correct
61 Correct 6 ms 10408 KB Output is correct
62 Correct 6 ms 10396 KB Output is correct
63 Correct 6 ms 10500 KB Output is correct
64 Correct 6 ms 10496 KB Output is correct
65 Correct 5 ms 10476 KB Output is correct
66 Correct 5 ms 10408 KB Output is correct
67 Correct 5 ms 10468 KB Output is correct
68 Correct 5 ms 10408 KB Output is correct
69 Correct 5 ms 10448 KB Output is correct
70 Correct 5 ms 10448 KB Output is correct
71 Correct 35 ms 10864 KB Output is correct
72 Correct 9 ms 10512 KB Output is correct
73 Correct 47 ms 10656 KB Output is correct
74 Correct 39 ms 10644 KB Output is correct
75 Correct 6 ms 10448 KB Output is correct
76 Correct 39 ms 10580 KB Output is correct
77 Correct 52 ms 10640 KB Output is correct
78 Correct 10 ms 10500 KB Output is correct
79 Correct 13 ms 10548 KB Output is correct
80 Correct 36 ms 10648 KB Output is correct
81 Correct 45 ms 10656 KB Output is correct
82 Correct 41 ms 10568 KB Output is correct
83 Correct 6 ms 10448 KB Output is correct
84 Correct 38 ms 10568 KB Output is correct
85 Correct 50 ms 10724 KB Output is correct
86 Correct 9 ms 10408 KB Output is correct
87 Correct 6 ms 10496 KB Output is correct
88 Correct 10 ms 10504 KB Output is correct
89 Correct 9 ms 10516 KB Output is correct
90 Correct 5 ms 10536 KB Output is correct
91 Correct 8 ms 10448 KB Output is correct
92 Correct 6 ms 10448 KB Output is correct
93 Correct 8 ms 10448 KB Output is correct
94 Correct 8 ms 10504 KB Output is correct
95 Correct 6 ms 10448 KB Output is correct
96 Correct 6 ms 10508 KB Output is correct
97 Correct 5 ms 10448 KB Output is correct