oj.uz

Submission #596086

# Submission time Handle Problem Language Result Execution time Memory
596086 2022-07-14T10:42:50 Z franfill The Big Prize (IOI17_prize) C++17
100 / 100
 136 ms 1516 KB 
#include "prize.h"
#include<bits/stdc++.h>
using namespace std;

struct fenwick
{
	int n;
	vector < int > T;
	
	fenwick(int n_)
	{
		n = n_ + 1;
		T.resize(n);
	}

	void add(int i, int v)
	{
		for (int k = i+1; k < n; k+=k&-k) T[k] += v;
	}

	int query(int i)
	{
		int ans = 0;
		for (int k = i+1; k; k -= k&-k) ans += T[k];
		return ans;
	}
};

int find_best(int n) {
	map < int , map < int , int > > queried;

	queue < pair < int , int > > toq;
	toq.emplace(0, n);
	fenwick ignore(n);

	while(!toq.empty())
	{
		auto [l, r] = toq.front();		
		toq.pop();
		int m = (l+r)/2;
		cerr << m << " " << ignore.query(m) << "\n";
		if (l >= r) continue;
		if (ignore.query(m) > 0) continue;
		cerr << "OK\n";

		auto res = ask(m);
		int left = res[0], right = res[1];
		int key = left+right;
		if (key == 0)
			return m;
		
		auto &occ = queried[key];	

		{
			auto it = occ.upper_bound(m);
			if (it != occ.end() && it->second == left)
			{
				while(it != occ.end() && it->second == left) it++;
				it--;
				int x = m, y = it->first;
				ignore.add(y, -1);
				ignore.add(x, 1);
				cerr << "ehi" << x << " " << y << "\n";
			}
		}

		{
			auto it = occ.upper_bound(m);
			if (it != occ.begin())
			{
				it--;
				while(it->second == left && it != occ.begin()) it--;
				it++;
				if (it->second == left && it->first < m)
				{
					int x=it->first, y = m;
					ignore.add(y, -1);
					ignore.add(x, 1);
					cerr << "ehi" << x << " " << y << "\n";
				}
			}
		}

		toq.emplace(l, m);
		toq.emplace(m, r);
		
		occ[m] = left;
	}
	
	return 0;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 1048 KB Output is correct
2 Correct 2 ms 1052 KB Output is correct
3 Correct 2 ms 1064 KB Output is correct
4 Correct 2 ms 1060 KB Output is correct
5 Correct 1 ms 1052 KB Output is correct
6 Correct 2 ms 1096 KB Output is correct
7 Correct 1 ms 1056 KB Output is correct
8 Correct 1 ms 1056 KB Output is correct
9 Correct 2 ms 1092 KB Output is correct
10 Correct 3 ms 1104 KB Output is correct

Subtask #2
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 976 KB Output is correct
2 Correct 2 ms 1052 KB Output is correct
3 Correct 3 ms 968 KB Output is correct
4 Correct 2 ms 1092 KB Output is correct
5 Correct 1 ms 1060 KB Output is correct
6 Correct 2 ms 1040 KB Output is correct
7 Correct 1 ms 1060 KB Output is correct
8 Correct 1 ms 1060 KB Output is correct
9 Correct 2 ms 976 KB Output is correct
10 Correct 3 ms 1104 KB Output is correct
11 Correct 12 ms 1060 KB Output is correct
12 Correct 10 ms 1104 KB Output is correct
13 Correct 16 ms 1052 KB Output is correct
14 Correct 17 ms 396 KB Output is correct
15 Correct 52 ms 1164 KB Output is correct
16 Correct 86 ms 1312 KB Output is correct
17 Correct 93 ms 1300 KB Output is correct
18 Correct 94 ms 1316 KB Output is correct
19 Correct 55 ms 1248 KB Output is correct
20 Correct 48 ms 836 KB Output is correct
21 Correct 93 ms 1388 KB Output is correct
22 Correct 47 ms 1196 KB Output is correct
23 Correct 4 ms 968 KB Output is correct
24 Correct 10 ms 1112 KB Output is correct
25 Correct 67 ms 1168 KB Output is correct
26 Correct 76 ms 1272 KB Output is correct
27 Correct 5 ms 1048 KB Output is correct
28 Correct 70 ms 1180 KB Output is correct
29 Correct 76 ms 1272 KB Output is correct
30 Correct 77 ms 1236 KB Output is correct
31 Correct 74 ms 1244 KB Output is correct
32 Correct 9 ms 1048 KB Output is correct
33 Correct 1 ms 208 KB Output is correct
34 Correct 92 ms 1304 KB Output is correct
35 Correct 8 ms 1104 KB Output is correct
36 Correct 86 ms 1228 KB Output is correct
37 Correct 10 ms 1052 KB Output is correct
38 Correct 5 ms 1060 KB Output is correct
39 Correct 87 ms 1244 KB Output is correct
40 Correct 85 ms 1516 KB Output is correct
41 Correct 98 ms 1224 KB Output is correct
42 Correct 72 ms 1504 KB Output is correct
43 Correct 93 ms 1344 KB Output is correct
44 Correct 54 ms 1212 KB Output is correct
45 Correct 62 ms 1176 KB Output is correct
46 Correct 86 ms 1512 KB Output is correct
47 Correct 69 ms 1292 KB Output is correct
48 Correct 55 ms 1248 KB Output is correct
49 Correct 81 ms 1312 KB Output is correct
50 Correct 102 ms 1300 KB Output is correct
51 Correct 80 ms 1308 KB Output is correct
52 Correct 80 ms 1296 KB Output is correct
53 Correct 5 ms 1104 KB Output is correct
54 Correct 79 ms 1504 KB Output is correct
55 Correct 79 ms 1308 KB Output is correct
56 Correct 87 ms 1276 KB Output is correct
57 Correct 49 ms 1264 KB Output is correct
58 Correct 78 ms 1340 KB Output is correct
59 Correct 99 ms 1296 KB Output is correct
60 Correct 78 ms 1200 KB Output is correct
61 Correct 4 ms 1052 KB Output is correct
62 Correct 4 ms 1036 KB Output is correct
63 Correct 5 ms 1048 KB Output is correct
64 Correct 6 ms 1096 KB Output is correct
65 Correct 2 ms 1052 KB Output is correct
66 Correct 1 ms 1056 KB Output is correct
67 Correct 2 ms 1112 KB Output is correct
68 Correct 2 ms 1064 KB Output is correct
69 Correct 3 ms 1048 KB Output is correct
70 Correct 1 ms 1080 KB Output is correct
71 Correct 127 ms 1456 KB Output is correct
72 Correct 14 ms 1224 KB Output is correct
73 Correct 136 ms 1428 KB Output is correct
74 Correct 127 ms 1440 KB Output is correct
75 Correct 6 ms 1104 KB Output is correct
76 Correct 115 ms 1360 KB Output is correct
77 Correct 97 ms 1336 KB Output is correct
78 Correct 15 ms 1096 KB Output is correct
79 Correct 68 ms 1232 KB Output is correct
80 Correct 99 ms 1300 KB Output is correct
81 Correct 91 ms 1272 KB Output is correct
82 Correct 93 ms 1232 KB Output is correct
83 Correct 4 ms 1104 KB Output is correct
84 Correct 112 ms 1224 KB Output is correct
85 Correct 107 ms 1408 KB Output is correct
86 Correct 7 ms 1108 KB Output is correct
87 Correct 4 ms 1060 KB Output is correct
88 Correct 5 ms 1104 KB Output is correct
89 Correct 5 ms 1104 KB Output is correct
90 Correct 3 ms 976 KB Output is correct
91 Correct 4 ms 1060 KB Output is correct
92 Correct 3 ms 1056 KB Output is correct
93 Correct 13 ms 1104 KB Output is correct
94 Correct 11 ms 1124 KB Output is correct
95 Correct 14 ms 1108 KB Output is correct
96 Correct 7 ms 1104 KB Output is correct
97 Correct 2 ms 976 KB Output is correct