Submission #136129

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
136129	2019-07-24T18:25:16 Z	JustasZ	The Big Prize (IOI17_prize)	C++14	100 / 100	61 ms	976 KB

prize

#include "prize.h"
#include <bits/stdc++.h>
#define pb push_back
#define all(a) a.begin(), a.end()
#define sz(a) (int)a.size()
#define x first
#define y second
#define debug(...) cout << "[" << #__VA_ARGS__ << ": " << __VA_ARGS__ << "]\n"
#define rd() abs((int)rng())
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int>pii;
const int maxn = 2e5 + 100;
const int mod = 1e9 + 7;
mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
/*vector<int> ask(int i)
{
	cout << "? " << i << endl;
	vector<int>a(2);
	cin >> a[0] >> a[1];
	return a;
}*/
map<int, vector<int> >mp;
vector<int> askk(int i)
{
	if(!mp.count(i))
		mp[i] = ask(i);
	return mp[i];
}
int bl = 495;
int find_best(int n)
{
	vector<int>a, b;
	if(n <= 5000)
	{
		for(int i = 0; i < n; i++)
		{
			a = askk(i);
			if(a[0] + a[1] == 0)
				return i;
		}
	}
	int mx = 0, st = 500;
	for(int i = 0; i < min(n, 500); i++)
	{
		a = askk(i);
		if(a[0] + a[1] == 0)
			return i;
		if(a[0] + a[1] > 30)
		{
			mx = a[0] + a[1];
			st = i + 1;
			break;
		}
		mx = max(mx, a[0] + a[1]);
	}
	for(int i = st; i < n; i += bl)
	{
		int j = min(i + bl - 1, n - 1);
		int p = i;
		a = askk(p);
		while(a[0] + a[1] != mx)
		{
			if(a[0] + a[1] == 0)
				return p;
			p++;
			if(p > j)
				break;
			a = askk(p);
		}
		b = askk(j);
		while(b[0] + b[1] != mx)
		{
			if(b[0] + b[1] == 0)
				return j;
			j--;
			if(j < p)
				break;
			b = askk(j);
		}
		if(p < j)
		{
			int between = b[0] - a[0];
			if(between != 0)
			{
				int it = p;
				while(it < j && between > 0)
				{
					a = askk(it);
					if(a[0] + a[1] != mx)
					{
						between--;
						if(a[0] + a[1] == 0)
							return it;
					}
					else
					{
						int l = it + 1, r = j - 1;
						while(l < r)
						{
							int mid = (l + r) / 2;
							b = askk(mid);
							if(b[0] + b[1] != mx)
								r = mid;
							else
							{
								if(b[0] > a[0])
									r = mid - 1;
								else
									l = mid + 1;
							} 
						}
						it = l;
						a = askk(it);
						--between;
						if(a[0] + a[1] == 0)
							return it;
					}
					++it;
				}
			}
		}
	}
}

Compilation message

prize.cpp: In function 'int find_best(int)':
prize.cpp:125:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

Subtask #1

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	8 ms	376 KB	Output is correct
2	Correct	8 ms	440 KB	Output is correct
3	Correct	11 ms	376 KB	Output is correct
4	Correct	17 ms	440 KB	Output is correct
5	Correct	11 ms	376 KB	Output is correct
6	Correct	2 ms	248 KB	Output is correct
7	Correct	12 ms	308 KB	Output is correct
8	Correct	9 ms	436 KB	Output is correct
9	Correct	11 ms	376 KB	Output is correct
10	Correct	17 ms	372 KB	Output is correct

Subtask #2

80.0 / 80.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	8 ms	380 KB	Output is correct
2	Correct	10 ms	376 KB	Output is correct
3	Correct	10 ms	376 KB	Output is correct
4	Correct	18 ms	448 KB	Output is correct
5	Correct	13 ms	376 KB	Output is correct
6	Correct	2 ms	296 KB	Output is correct
7	Correct	12 ms	380 KB	Output is correct
8	Correct	7 ms	376 KB	Output is correct
9	Correct	12 ms	376 KB	Output is correct
10	Correct	14 ms	380 KB	Output is correct
11	Correct	5 ms	412 KB	Output is correct
12	Correct	2 ms	376 KB	Output is correct
13	Correct	13 ms	376 KB	Output is correct
14	Correct	5 ms	248 KB	Output is correct
15	Correct	10 ms	376 KB	Output is correct
16	Correct	49 ms	716 KB	Output is correct
17	Correct	2 ms	300 KB	Output is correct
18	Correct	53 ms	760 KB	Output is correct
19	Correct	2 ms	504 KB	Output is correct
20	Correct	12 ms	524 KB	Output is correct
21	Correct	21 ms	504 KB	Output is correct
22	Correct	4 ms	344 KB	Output is correct
23	Correct	5 ms	460 KB	Output is correct
24	Correct	2 ms	376 KB	Output is correct
25	Correct	20 ms	600 KB	Output is correct
26	Correct	17 ms	592 KB	Output is correct
27	Correct	10 ms	388 KB	Output is correct
28	Correct	31 ms	860 KB	Output is correct
29	Correct	41 ms	612 KB	Output is correct
30	Correct	55 ms	864 KB	Output is correct
31	Correct	2 ms	380 KB	Output is correct
32	Correct	11 ms	376 KB	Output is correct
33	Correct	2 ms	380 KB	Output is correct
34	Correct	11 ms	472 KB	Output is correct
35	Correct	16 ms	312 KB	Output is correct
36	Correct	16 ms	380 KB	Output is correct
37	Correct	5 ms	380 KB	Output is correct
38	Correct	8 ms	376 KB	Output is correct
39	Correct	27 ms	480 KB	Output is correct
40	Correct	53 ms	688 KB	Output is correct
41	Correct	30 ms	576 KB	Output is correct
42	Correct	29 ms	616 KB	Output is correct
43	Correct	23 ms	584 KB	Output is correct
44	Correct	14 ms	560 KB	Output is correct
45	Correct	18 ms	376 KB	Output is correct
46	Correct	2 ms	376 KB	Output is correct
47	Correct	24 ms	440 KB	Output is correct
48	Correct	39 ms	724 KB	Output is correct
49	Correct	6 ms	248 KB	Output is correct
50	Correct	54 ms	776 KB	Output is correct
51	Correct	23 ms	504 KB	Output is correct
52	Correct	2 ms	248 KB	Output is correct
53	Correct	15 ms	424 KB	Output is correct
54	Correct	14 ms	592 KB	Output is correct
55	Correct	2 ms	308 KB	Output is correct
56	Correct	31 ms	852 KB	Output is correct
57	Correct	40 ms	632 KB	Output is correct
58	Correct	41 ms	704 KB	Output is correct
59	Correct	33 ms	580 KB	Output is correct
60	Correct	35 ms	552 KB	Output is correct
61	Correct	9 ms	436 KB	Output is correct
62	Correct	5 ms	440 KB	Output is correct
63	Correct	16 ms	376 KB	Output is correct
64	Correct	13 ms	376 KB	Output is correct
65	Correct	10 ms	376 KB	Output is correct
66	Correct	19 ms	504 KB	Output is correct
67	Correct	15 ms	376 KB	Output is correct
68	Correct	4 ms	352 KB	Output is correct
69	Correct	10 ms	376 KB	Output is correct
70	Correct	8 ms	516 KB	Output is correct
71	Correct	31 ms	844 KB	Output is correct
72	Correct	8 ms	520 KB	Output is correct
73	Correct	53 ms	760 KB	Output is correct
74	Correct	40 ms	976 KB	Output is correct
75	Correct	17 ms	376 KB	Output is correct
76	Correct	50 ms	768 KB	Output is correct
77	Correct	51 ms	760 KB	Output is correct
78	Correct	14 ms	504 KB	Output is correct
79	Correct	34 ms	528 KB	Output is correct
80	Correct	31 ms	896 KB	Output is correct
81	Correct	61 ms	796 KB	Output is correct
82	Correct	47 ms	932 KB	Output is correct
83	Correct	17 ms	376 KB	Output is correct
84	Correct	33 ms	856 KB	Output is correct
85	Correct	50 ms	760 KB	Output is correct
86	Correct	10 ms	508 KB	Output is correct
87	Correct	13 ms	376 KB	Output is correct
88	Correct	9 ms	512 KB	Output is correct
89	Correct	9 ms	640 KB	Output is correct
90	Correct	21 ms	376 KB	Output is correct
91	Correct	15 ms	424 KB	Output is correct
92	Correct	9 ms	516 KB	Output is correct
93	Correct	13 ms	556 KB	Output is correct
94	Correct	11 ms	564 KB	Output is correct
95	Correct	18 ms	376 KB	Output is correct
96	Correct	13 ms	376 KB	Output is correct
97	Correct	16 ms	376 KB	Output is correct