Submission #98912

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
98912	2019-02-27T12:04:44 Z	square1001	The Big Prize (IOI17_prize)	C++14	20 / 100	249 ms	644 KB

prize

#include "prize.h"
#include <map>
#include <random>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;
struct infos {
	int pos, left, right;
	infos(int pos_, int left_, int right_) : pos(pos_), left(left_), right(right_) {};
};
mt19937 mt(1902272037);
int rand_rng(int l, int r) {
	uniform_int_distribution<int> p(l, r - 1);
	return p(mt);
}
vector<int> random_pos(int n, int m) {
	vector<int> ans;
	for(int i = 0; i < m; ++i) {
		int x = -1;
		while(x == -1 || find(ans.begin(), ans.end(), x) != ans.end()) {
			x = rand_rng(0, n);
		}
		ans.push_back(x);
	}
	sort(ans.begin(), ans.end());
	return ans;
}
int find_best(int n) {
	vector<int> samples = random_pos(n, min(n, 5));
	int all = 0;
	for(int i : samples) {
		vector<int> res = ask(i);
		all = max(all, res[0] + res[1]);
	}
	vector<infos> v = { infos(-1, 0, all), infos(n, all, 0) };
	vector<int> s;
	while(true) {
		int maxd = 0, ptr = -1, mrem = -1;
		for(int i = 0; i < int(v.size()) - 1; ++i) {
			int rem = v[i].right + v[i + 1].left - all;
			rem -= lower_bound(s.begin(), s.end(), v[i + 1].pos) - lower_bound(s.begin(), s.end(), v[i].pos);
			if(rem > 0 && v[i + 1].pos - v[i].pos > maxd) {
				maxd = v[i + 1].pos - v[i].pos;
				ptr = i;
				mrem = rem;
			}
		}
		if(ptr == -1) break;
		if(maxd >= 2) {
			int m = (v[ptr].pos + v[ptr + 1].pos) / 2;
			vector<int> res = ask(m);
			if(res[0] + res[1] == 0) return m;
			if(res[0] + res[1] == all) {
				v.insert(v.begin() + ptr + 1, infos(m, res[0], res[1]));
			}
			else {
				--mrem;
				s.push_back(m);
				int cm = m - 1, flag = 0;
				while(mrem > 0 && cm > v[ptr].pos) {
					vector<int> res2 = ask(cm);
					if(res2[0] + res2[1] == 0) return cm;
					if(res2[0] + res2[1] == all) {
						v.insert(v.begin() + ptr + 1, infos(cm, res2[0], res2[1]));
						flag = 1;
						break;
					}
					s.push_back(cm);
					--mrem;
					--cm;
				}
				cm = m + 1;
				while(mrem > 0 && cm < v[ptr + 1].pos) {
					vector<int> res2 = ask(cm);
					if(res2[0] + res2[1] == 0) return cm;
					if(res2[0] + res2[1] == all) {
						v.insert(v.begin() + ptr + 1 + flag, infos(cm, res2[0], res2[1]));
						break;
					}
					s.push_back(cm);
					--mrem;
					++cm;
				}
				sort(s.begin(), s.end());
			}
		}
	}
	return -1;
}

Subtask #1

20.0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	376 KB	Output is correct
2	Correct	3 ms	396 KB	Output is correct
3	Correct	2 ms	384 KB	Output is correct
4	Correct	2 ms	256 KB	Output is correct
5	Correct	2 ms	384 KB	Output is correct
6	Correct	3 ms	256 KB	Output is correct
7	Correct	2 ms	320 KB	Output is correct
8	Correct	2 ms	304 KB	Output is correct
9	Correct	3 ms	512 KB	Output is correct
10	Correct	2 ms	256 KB	Output is correct

Subtask #2

0 / 80.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	400 KB	Output is correct
2	Correct	2 ms	256 KB	Output is correct
3	Correct	2 ms	256 KB	Output is correct
4	Correct	2 ms	308 KB	Output is correct
5	Correct	2 ms	376 KB	Output is correct
6	Correct	3 ms	256 KB	Output is correct
7	Correct	2 ms	256 KB	Output is correct
8	Correct	3 ms	384 KB	Output is correct
9	Correct	2 ms	256 KB	Output is correct
10	Correct	3 ms	384 KB	Output is correct
11	Correct	6 ms	304 KB	Output is correct
12	Correct	6 ms	324 KB	Output is correct
13	Correct	6 ms	408 KB	Output is correct
14	Correct	13 ms	256 KB	Output is correct
15	Correct	132 ms	432 KB	Output is correct
16	Correct	164 ms	504 KB	Output is correct
17	Correct	211 ms	412 KB	Output is correct
18	Correct	98 ms	428 KB	Output is correct
19	Correct	145 ms	412 KB	Output is correct
20	Correct	79 ms	536 KB	Output is correct
21	Correct	113 ms	320 KB	Output is correct
22	Correct	120 ms	424 KB	Output is correct
23	Correct	2 ms	384 KB	Output is correct
24	Correct	5 ms	316 KB	Output is correct
25	Correct	181 ms	376 KB	Output is correct
26	Correct	202 ms	416 KB	Output is correct
27	Correct	3 ms	256 KB	Output is correct
28	Correct	54 ms	452 KB	Output is correct
29	Correct	123 ms	468 KB	Output is correct
30	Correct	111 ms	448 KB	Output is correct
31	Correct	76 ms	384 KB	Output is correct
32	Correct	7 ms	312 KB	Output is correct
33	Correct	3 ms	384 KB	Output is correct
34	Correct	54 ms	384 KB	Output is correct
35	Correct	2 ms	412 KB	Output is correct
36	Correct	200 ms	492 KB	Output is correct
37	Correct	7 ms	252 KB	Output is correct
38	Correct	3 ms	256 KB	Output is correct
39	Correct	222 ms	468 KB	Output is correct
40	Correct	158 ms	332 KB	Output is correct
41	Correct	199 ms	432 KB	Output is correct
42	Correct	196 ms	644 KB	Output is correct
43	Correct	91 ms	404 KB	Output is correct
44	Correct	193 ms	532 KB	Output is correct
45	Correct	240 ms	544 KB	Output is correct
46	Correct	187 ms	508 KB	Output is correct
47	Correct	213 ms	532 KB	Output is correct
48	Correct	204 ms	448 KB	Output is correct
49	Correct	55 ms	464 KB	Output is correct
50	Correct	243 ms	376 KB	Output is correct
51	Correct	231 ms	512 KB	Output is correct
52	Correct	230 ms	508 KB	Output is correct
53	Correct	3 ms	256 KB	Output is correct
54	Correct	139 ms	404 KB	Output is correct
55	Correct	241 ms	392 KB	Output is correct
56	Correct	249 ms	384 KB	Output is correct
57	Correct	141 ms	400 KB	Output is correct
58	Correct	112 ms	432 KB	Output is correct
59	Correct	162 ms	492 KB	Output is correct
60	Correct	97 ms	376 KB	Output is correct
61	Correct	3 ms	304 KB	Output is correct
62	Correct	2 ms	384 KB	Output is correct
63	Correct	2 ms	384 KB	Output is correct
64	Correct	4 ms	384 KB	Output is correct
65	Correct	3 ms	256 KB	Output is correct
66	Incorrect	7 ms	312 KB	Integer -1 violates the range [0, 199999]
67	Halted	0 ms	0 KB	-