Submission #152456

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
152456	2019-09-08T03:54:20 Z	qkxwsm	The Big Prize (IOI17_prize)	C++14	97.67 / 100	69 ms	2260 KB

prize

/*
PROG: template
LANG: C++11
    _____
  .'     '.
 /  0   0  \
|     ^     |
|  \     /  |
 \  '---'  /
  '._____.'
 */
#include <bits/stdc++.h>
#include "prize.h"

using namespace std;

template<class T>
void readi(T &x)
{
	T input = 0;
	bool negative = false;
	char c = ' ';
	while (c < '-')
	{
		c = getchar();
	}
	if (c == '-')
	{
		negative = true;
		c = getchar();
	}
	while (c >= '0')
	{
		input = input * 10 + (c - '0');
		c = getchar();
	}
	if (negative)
	{
		input = -input;
	}
	x = input;
}
template<class T>
void printi(T output)
{
	if (output == 0)
	{
		putchar('0');
		return;
	}
	if (output < 0)
	{
		putchar('-');
		output = -output;
	}
	int aout[20];
	int ilen = 0;
	while(output)
	{
		aout[ilen] = ((output % 10));
		output /= 10;
		ilen++;
	}
	for (int i = ilen - 1; i >= 0; i--)
	{
		putchar(aout[i] + '0');
	}
	return;
}
template<class T>
void ckmin(T &a, T b)
{
	a = min(a, b);
}
template<class T>
void ckmax(T &a, T b)
{
	a = max(a, b);
}
long long randomize(long long mod)
{
	return ((1ll << 30) * rand() + (1ll << 15) * rand() + rand()) % mod;
}

#define MP make_pair
#define PB push_back
#define PF push_front
#define LB lower_bound
#define UB upper_bound
#define fi first
#define se second

const long double PI = 4.0 * atan(1.0);
const long double EPS = 1e-20;

#define MAGIC 347
#define SINF 10007
#define CO 1000007
#define INF 1000000007
#define BIG 1000000931
#define LARGE 1696969696967ll
#define GIANT 2564008813937411ll
#define LLINF 2696969696969696969ll
#define MAXN 200013

long long normalize(long long x, long long mod = INF)
{
	return (((x % mod) + mod) % mod);
}

typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

int N, M;
bool vis[MAXN];
pii quer[MAXN];
int ans = -1;

void get(int idx)
{
	if (vis[idx])
	{
		return;
	}
	vis[idx] = true;
	vector<int> res = ask(idx);
	quer[idx] = MP(res[0], res[1]);
	if (quer[idx] == MP(0, 0)) ans = idx;
//	cerr << idx << ' ' << quer[idx].fi << ' ' << quer[idx].se << endl;
//	if (quer[idx].fi + quer[idx].se != M)
//	{
//		special[idx] = true;
////		cerr << "special " << idx << endl;
//	}
	return;
}
void solve(int L, int R)
{
	//guarantee that neither L, R are special and both are queried
	if (L > R) return;
	if (ans != -1) return;
	if (quer[L].fi == quer[R].fi) return;
//	cerr << "solve " << L << ' ' << R << endl;
	int mid1, mid2;
	if (rand() % 2)
	{
		mid1 = (L + R)/2;
		for (; mid1 <= R; mid1++)
		{
			get(mid1); if (ans != -1) return;
			if (quer[mid1].fi + quer[mid1].se == M)
			{
				break;
			}
		}
		mid2 = (L + R)/2;
		for (; mid2 >= L; mid2--)
		{
			get(mid2); if (ans != -1) return;
			if (quer[mid2].fi + quer[mid2].se == M)
			{
				break;
			}
		}
	}
	else
	{
		mid2 = (L + R)/2;
		for (; mid2 >= L; mid2--)
		{
			get(mid2); if (ans != -1) return;
			if (quer[mid2].fi + quer[mid2].se == M)
			{
				break;
			}
		}
		mid1 = (L + R)/2;
		for (; mid1 <= R; mid1++)
		{
			get(mid1); if (ans != -1) return;
			if (quer[mid1].fi + quer[mid1].se == M)
			{
				break;
			}
		}
	}
	if (rand() % 2)
	{
		solve(mid1, R); if (ans != -1) return;
		solve(L, mid2); if (ans != -1) return;
	}
	else
	{
		solve(L, mid2); if (ans != -1) return;
		solve(mid1, R); if (ans != -1) return;
	}
	//at least one special guy in L...lmid - 1
}

int find_best(int n)
{
	//at most 6 distinct prizes
	//711 guys are not 6
	//query 712 times, then you get to know the location of a max
	//1, 2, 5, 26, 677, whatever
	//1, 3, 8, 34, 711, 200000
	N = n;
	if (N == 1) return 0;
	//question is: you want to query at most 5000 times and find the 1
	//find the locations of all the not1's in O(fast)
	//there are 711 flags in an array of 200000, can you find the locations of all of them, given how many are <= x
	for (int i = 0; i < min(237, N); i++)
	{
		get(i); if (ans != -1) return ans;
		ckmax(M, quer[i].fi + quer[i].se);
	}
	for (int i = 0; i < min(237, N); i++)
	{
		get(N - 1 - i); if (ans != -1) return ans;
		ckmax(M, quer[N - 1 - i].fi + quer[N - 1 - i].se);
	}
//	cerr << M << endl;
	int lt = 0, rt = N - 1;
	for (; lt < N; lt++)
	{
		get(lt); if (ans != -1) return ans;
		if (quer[lt].fi + quer[lt].se == M)
		{
			break;
		}
	}
	for (; rt >= 0; rt--)
	{
		get(rt); if (ans != -1) return ans;
		if (quer[rt].fi + quer[rt].se == M)
		{
			break;
		}
	}
//	cerr << lt << ' ' << rt << endl;
	solve(lt, rt);
	return ans;
	//M is the # of special guys
}

Subtask #1

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	7 ms	380 KB	Output is correct
2	Correct	7 ms	376 KB	Output is correct
3	Correct	6 ms	380 KB	Output is correct
4	Correct	5 ms	380 KB	Output is correct
5	Correct	4 ms	440 KB	Output is correct
6	Correct	2 ms	248 KB	Output is correct
7	Correct	8 ms	380 KB	Output is correct
8	Correct	7 ms	376 KB	Output is correct
9	Correct	4 ms	520 KB	Output is correct
10	Correct	8 ms	376 KB	Output is correct

Subtask #2

77.67 / 80.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	7 ms	504 KB	Output is correct
2	Correct	6 ms	376 KB	Output is correct
3	Correct	4 ms	520 KB	Output is correct
4	Correct	4 ms	248 KB	Output is correct
5	Correct	7 ms	376 KB	Output is correct
6	Correct	2 ms	376 KB	Output is correct
7	Correct	4 ms	392 KB	Output is correct
8	Correct	7 ms	376 KB	Output is correct
9	Correct	7 ms	248 KB	Output is correct
10	Correct	8 ms	376 KB	Output is correct
11	Correct	8 ms	248 KB	Output is correct
12	Correct	8 ms	760 KB	Output is correct
13	Correct	12 ms	1016 KB	Output is correct
14	Correct	11 ms	376 KB	Output is correct
15	Correct	26 ms	1144 KB	Output is correct
16	Correct	45 ms	1684 KB	Output is correct
17	Correct	16 ms	1148 KB	Output is correct
18	Correct	42 ms	1648 KB	Output is correct
19	Correct	23 ms	1036 KB	Output is correct
20	Correct	8 ms	628 KB	Output is correct
21	Correct	17 ms	700 KB	Output is correct
22	Correct	19 ms	888 KB	Output is correct
23	Correct	6 ms	504 KB	Output is correct
24	Correct	6 ms	676 KB	Output is correct
25	Correct	47 ms	1824 KB	Output is correct
26	Correct	39 ms	1572 KB	Output is correct
27	Correct	5 ms	488 KB	Output is correct
28	Correct	43 ms	1668 KB	Output is correct
29	Correct	38 ms	1636 KB	Output is correct
30	Correct	19 ms	1252 KB	Output is correct
31	Correct	11 ms	948 KB	Output is correct
32	Correct	13 ms	948 KB	Output is correct
33	Correct	2 ms	376 KB	Output is correct
34	Correct	18 ms	760 KB	Output is correct
35	Correct	5 ms	552 KB	Output is correct
36	Correct	26 ms	1068 KB	Output is correct
37	Correct	5 ms	488 KB	Output is correct
38	Correct	5 ms	520 KB	Output is correct
39	Correct	9 ms	376 KB	Output is correct
40	Correct	17 ms	1204 KB	Output is correct
41	Correct	34 ms	1284 KB	Output is correct
42	Correct	19 ms	1376 KB	Output is correct
43	Correct	28 ms	1532 KB	Output is correct
44	Correct	10 ms	376 KB	Output is correct
45	Correct	18 ms	696 KB	Output is correct
46	Correct	24 ms	888 KB	Output is correct
47	Correct	6 ms	468 KB	Output is correct
48	Correct	52 ms	1784 KB	Output is correct
49	Correct	16 ms	1156 KB	Output is correct
50	Correct	28 ms	1756 KB	Output is correct
51	Correct	9 ms	380 KB	Output is correct
52	Correct	25 ms	1064 KB	Output is correct
53	Correct	7 ms	504 KB	Output is correct
54	Correct	7 ms	376 KB	Output is correct
55	Correct	27 ms	952 KB	Output is correct
56	Correct	25 ms	1816 KB	Output is correct
57	Correct	53 ms	2040 KB	Output is correct
58	Partially correct	60 ms	2128 KB	Partially correct - number of queries: 5030
59	Correct	37 ms	1400 KB	Output is correct
60	Correct	51 ms	1920 KB	Output is correct
61	Correct	7 ms	504 KB	Output is correct
62	Correct	9 ms	504 KB	Output is correct
63	Correct	9 ms	504 KB	Output is correct
64	Correct	7 ms	504 KB	Output is correct
65	Correct	4 ms	248 KB	Output is correct
66	Correct	4 ms	312 KB	Output is correct
67	Correct	5 ms	328 KB	Output is correct
68	Correct	8 ms	308 KB	Output is correct
69	Correct	5 ms	316 KB	Output is correct
70	Correct	5 ms	416 KB	Output is correct
71	Partially correct	56 ms	2012 KB	Partially correct - number of queries: 5233
72	Correct	8 ms	1184 KB	Output is correct
73	Partially correct	32 ms	2260 KB	Partially correct - number of queries: 5170
74	Correct	60 ms	1872 KB	Output is correct
75	Correct	8 ms	632 KB	Output is correct
76	Correct	52 ms	2004 KB	Output is correct
77	Partially correct	31 ms	2052 KB	Partially correct - number of queries: 5190
78	Correct	15 ms	1148 KB	Output is correct
79	Correct	18 ms	1860 KB	Output is correct
80	Partially correct	31 ms	2076 KB	Partially correct - number of queries: 5149
81	Partially correct	69 ms	1964 KB	Partially correct - number of queries: 5191
82	Partially correct	58 ms	1996 KB	Partially correct - number of queries: 5123
83	Correct	9 ms	632 KB	Output is correct
84	Correct	34 ms	2024 KB	Output is correct
85	Partially correct	58 ms	2092 KB	Partially correct - number of queries: 5182
86	Correct	7 ms	376 KB	Output is correct
87	Correct	6 ms	400 KB	Output is correct
88	Correct	5 ms	324 KB	Output is correct
89	Correct	6 ms	328 KB	Output is correct
90	Correct	8 ms	316 KB	Output is correct
91	Correct	4 ms	388 KB	Output is correct
92	Correct	8 ms	376 KB	Output is correct
93	Correct	13 ms	760 KB	Output is correct
94	Correct	7 ms	876 KB	Output is correct
95	Correct	10 ms	892 KB	Output is correct
96	Correct	10 ms	888 KB	Output is correct
97	Correct	7 ms	376 KB	Output is correct