Submission #104184

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
104184	2019-04-04T09:27:22 Z	RockyB	The Big Prize (IOI17_prize)	C++17	96.3 / 100	137 ms	972 KB

prize

/// In The Name Of God
 
#include <bits/stdc++.h>
#ifndef IOI2018
#include "prize.h"
#endif
 
#define f first
#define s second
 
#define pb push_back
#define pp pop_back
#define mp make_pair
 
#define sz(x) (int)x.size()
#define sqr(x) ((x) * 1ll * (x))
#define all(x) x.begin(), x.end()
 
#define rep(i, l, r) for (int i = (l); i < (r); i++)
#define per(i, l, r) for (int i = (l); i >= (r); i--)
 
#define Kazakhstan ios_base :: sync_with_stdio(0), cin.tie(0), cout.tie(0);
 
#define nl '\n'
#define ioi exit(0);
 
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
 
const int N = (int)5e5 + 7;
const int inf = (int)1e9 + 7;
const int mod = (int)1e9 + 7;
const ll linf = (ll)1e18 + 7;
 
const int dx[] = {-1, 0, 1, 0, 1, -1, -1, 1};
const int dy[] = {0, 1, 0, -1, 1, -1, 1, -1};
 
using namespace std;
 
namespace com {
	static const int max_q = 5000;
	static int n;
	static int query_count = 0;
	static vector<int> g;
	static vector<vector<int> > rank_count;
 
}
 
namespace grader {
	using namespace com;
	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;
	}
}
#ifdef IOI2018
using namespace grader;
#endif
 
const int K = 447;
map <int, vector <int > > dp;
  
vector <int> get(int p) {
	if (dp.count(p)) return dp[p];
	return dp[p] = ask(p);
}
int mx;
int tin;

/// (n - 1) / k + cnt * 
int solve(int p, int n) {
	if (p >= n) assert(0);

	{
		while (1) {
			vector <int> now = get(p);
			if (now[0] + now[1] == 0) return p;
			if (now[0] + now[1] == mx) break;
			p++;
		}
	}
	vector <int> _c = get(p);
	for (auto it : dp) {
			if (it.f >= p && (it.s[0] == 0 || it.s[0] == _c[0])) {
				p = it.f;
			}
		}
	int l = p / K + 1, r = (n - 1) / K, res = p / K;
	vector <int> cur = get(p);
	while (l <= r) {
		int mid = l + r >> 1;
		vector <int> now = get(K * mid);
		if (now[0] + now[1] == 0) return K * mid;
		if (cur == now) res = mid, l = mid + 1;
		else r = mid - 1;
	}
	//cerr << p << ' ' << res * K << nl;
	l = max(p, res * K);
	r = min(n - 1, (res + 1) * K - 1);
	int nxt = -1;
	while (l <= r) {
		int mid = l + r >> 1;
		vector <int> now = get(mid);
		if (now[0] + now[1] == 0) return mid;
		if (cur[0] == now[0]) nxt = mid, l = mid + 1;
		else r = mid - 1;
	}
	++nxt;
	return solve(nxt, n);
}
int find_best(int n) {
	int id = -1;
    per(i, min(n - 1, 474), 0) {
		vector <int> cur = ask(i);
		if (!max(cur[0], cur[1])) return i;
		if (mx < cur[0] + cur[1]) mx = cur[0] + cur[1], id = i;
	}
	return solve(id, n);
} 
 
 
namespace read {
	using namespace com;
	void read() {
		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);
		cout << res;
		ioi
		cout << res << endl << "Query count: " << query_count << endl;
		ioi
	}
}
 
#ifdef IOI2018
int main() {
	#ifdef IOI2018
		freopen ("in.txt", "r", stdin);
		freopen ("slow.out", "w", stdout);
	#endif
	read :: read();
}
#endif

Compilation message

prize.cpp: In function 'int solve(int, int)':
prize.cpp:105:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   int mid = l + r >> 1;
             ~~^~~
prize.cpp:116:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   int mid = l + r >> 1;
             ~~^~~

Subtask #1

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	4 ms	392 KB	Output is correct
2	Correct	6 ms	256 KB	Output is correct
3	Correct	8 ms	384 KB	Output is correct
4	Correct	7 ms	256 KB	Output is correct
5	Correct	4 ms	320 KB	Output is correct
6	Correct	5 ms	256 KB	Output is correct
7	Correct	5 ms	256 KB	Output is correct
8	Correct	7 ms	384 KB	Output is correct
9	Correct	7 ms	256 KB	Output is correct
10	Correct	6 ms	256 KB	Output is correct

Subtask #2

76.3 / 80.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	5 ms	400 KB	Output is correct
2	Correct	4 ms	396 KB	Output is correct
3	Correct	6 ms	256 KB	Output is correct
4	Correct	4 ms	384 KB	Output is correct
5	Correct	5 ms	504 KB	Output is correct
6	Correct	6 ms	384 KB	Output is correct
7	Correct	4 ms	512 KB	Output is correct
8	Correct	9 ms	256 KB	Output is correct
9	Correct	5 ms	384 KB	Output is correct
10	Correct	7 ms	384 KB	Output is correct
11	Correct	10 ms	384 KB	Output is correct
12	Correct	7 ms	384 KB	Output is correct
13	Correct	16 ms	256 KB	Output is correct
14	Correct	9 ms	256 KB	Output is correct
15	Correct	13 ms	384 KB	Output is correct
16	Correct	74 ms	820 KB	Output is correct
17	Correct	3 ms	256 KB	Output is correct
18	Partially correct	123 ms	924 KB	Partially correct - number of queries: 5338
19	Correct	2 ms	384 KB	Output is correct
20	Correct	24 ms	504 KB	Output is correct
21	Correct	31 ms	600 KB	Output is correct
22	Correct	10 ms	248 KB	Output is correct
23	Correct	6 ms	256 KB	Output is correct
24	Correct	4 ms	320 KB	Output is correct
25	Correct	41 ms	840 KB	Output is correct
26	Correct	39 ms	632 KB	Output is correct
27	Correct	9 ms	308 KB	Output is correct
28	Correct	109 ms	916 KB	Output is correct
29	Correct	74 ms	808 KB	Output is correct
30	Partially correct	92 ms	932 KB	Partially correct - number of queries: 5292
31	Correct	3 ms	256 KB	Output is correct
32	Correct	8 ms	256 KB	Output is correct
33	Correct	2 ms	256 KB	Output is correct
34	Correct	20 ms	504 KB	Output is correct
35	Correct	4 ms	396 KB	Output is correct
36	Correct	11 ms	504 KB	Output is correct
37	Correct	7 ms	384 KB	Output is correct
38	Correct	7 ms	384 KB	Output is correct
39	Correct	39 ms	504 KB	Output is correct
40	Correct	96 ms	760 KB	Output is correct
41	Correct	41 ms	568 KB	Output is correct
42	Correct	50 ms	632 KB	Output is correct
43	Correct	53 ms	632 KB	Output is correct
44	Correct	35 ms	552 KB	Output is correct
45	Correct	18 ms	516 KB	Output is correct
46	Correct	2 ms	256 KB	Output is correct
47	Correct	40 ms	588 KB	Output is correct
48	Correct	80 ms	760 KB	Output is correct
49	Correct	10 ms	424 KB	Output is correct
50	Partially correct	135 ms	944 KB	Partially correct - number of queries: 5345
51	Correct	30 ms	504 KB	Output is correct
52	Correct	4 ms	396 KB	Output is correct
53	Correct	5 ms	388 KB	Output is correct
54	Correct	32 ms	652 KB	Output is correct
55	Correct	3 ms	256 KB	Output is correct
56	Partially correct	126 ms	888 KB	Partially correct - number of queries: 5332
57	Correct	19 ms	504 KB	Output is correct
58	Correct	52 ms	744 KB	Output is correct
59	Correct	48 ms	752 KB	Output is correct
60	Correct	48 ms	744 KB	Output is correct
61	Correct	6 ms	384 KB	Output is correct
62	Correct	4 ms	392 KB	Output is correct
63	Correct	4 ms	516 KB	Output is correct
64	Correct	7 ms	256 KB	Output is correct
65	Correct	4 ms	384 KB	Output is correct
66	Correct	7 ms	416 KB	Output is correct
67	Correct	6 ms	512 KB	Output is correct
68	Correct	3 ms	256 KB	Output is correct
69	Correct	11 ms	256 KB	Output is correct
70	Correct	7 ms	384 KB	Output is correct
71	Partially correct	137 ms	928 KB	Partially correct - number of queries: 5136
72	Correct	12 ms	384 KB	Output is correct
73	Partially correct	107 ms	912 KB	Partially correct - number of queries: 5080
74	Partially correct	107 ms	888 KB	Partially correct - number of queries: 5104
75	Correct	4 ms	412 KB	Output is correct
76	Correct	92 ms	760 KB	Output is correct
77	Partially correct	121 ms	972 KB	Partially correct - number of queries: 5370
78	Correct	9 ms	384 KB	Output is correct
79	Correct	29 ms	568 KB	Output is correct
80	Partially correct	100 ms	892 KB	Partially correct - number of queries: 5355
81	Partially correct	112 ms	940 KB	Partially correct - number of queries: 5363
82	Correct	51 ms	700 KB	Output is correct
83	Correct	9 ms	324 KB	Output is correct
84	Correct	81 ms	808 KB	Output is correct
85	Partially correct	96 ms	916 KB	Partially correct - number of queries: 5367
86	Correct	32 ms	640 KB	Output is correct
87	Correct	6 ms	384 KB	Output is correct
88	Correct	18 ms	560 KB	Output is correct
89	Correct	24 ms	376 KB	Output is correct
90	Correct	7 ms	384 KB	Output is correct
91	Correct	12 ms	444 KB	Output is correct
92	Correct	4 ms	324 KB	Output is correct
93	Correct	11 ms	324 KB	Output is correct
94	Correct	8 ms	256 KB	Output is correct
95	Correct	10 ms	256 KB	Output is correct
96	Correct	12 ms	256 KB	Output is correct
97	Correct	7 ms	384 KB	Output is correct