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Submission #434811

# Submission time Handle Problem Language Result Execution time Memory
434811 2021-06-21T20:46:38 Z dutch The Big Prize (IOI17_prize) C++17
100 / 100
 58 ms 328 KB 
#include <bits/stdc++.h>
using namespace std;
#include "prize.h"
 
int ans, val;
 
void search(int l, int r, int lx, int rx){
	if(l > r || ans >= 0 || lx + rx == val) return;
	int m1 = (l + r) / 2, m2 = m1 + 1, x, y, cnt = 0;
	vector<int> q = {0, 0};
	while(1){
		if((y = m1-l > r-m2)) x = m1--;
		else x = m2++;
 
		q = ask(x);
		if(q[0] + q[1] == 0) return void(ans = x);
		if(q[0] + q[1] < val) ++cnt;
		else break;
 
		if(cnt == val - lx - rx) return;
	}
 
	q[!y] += cnt;
 
	search(l, m1, lx, q[1]);
	search(m2, r, q[0], rx);
}
 
int find_best(int n){
  	ans = val = -1;
	for(int i=1; i<n; i+=i){
		vector<int> q = ask(i-1);
		val = max(val, q[0] + q[1]);
      	q = ask(n-i);
      	val = max(val, q[0] + q[1]);
	}
	search(0, n-1, 0, 0);
	return ans;
}

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 236 KB Output is correct
2 Correct 1 ms 284 KB Output is correct
3 Correct 1 ms 200 KB Output is correct
4 Correct 1 ms 260 KB Output is correct
5 Correct 1 ms 284 KB Output is correct
6 Correct 2 ms 200 KB Output is correct
7 Correct 1 ms 284 KB Output is correct
8 Correct 1 ms 200 KB Output is correct
9 Correct 1 ms 200 KB Output is correct
10 Correct 1 ms 200 KB Output is correct

Subtask #2
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 280 KB Output is correct
2 Correct 1 ms 264 KB Output is correct
3 Correct 1 ms 200 KB Output is correct
4 Correct 1 ms 200 KB Output is correct
5 Correct 1 ms 284 KB Output is correct
6 Correct 1 ms 280 KB Output is correct
7 Correct 1 ms 284 KB Output is correct
8 Correct 1 ms 280 KB Output is correct
9 Correct 1 ms 320 KB Output is correct
10 Correct 1 ms 200 KB Output is correct
11 Correct 3 ms 200 KB Output is correct
12 Correct 1 ms 200 KB Output is correct
13 Correct 6 ms 200 KB Output is correct
14 Correct 3 ms 200 KB Output is correct
15 Correct 6 ms 284 KB Output is correct
16 Correct 42 ms 200 KB Output is correct
17 Correct 1 ms 276 KB Output is correct
18 Correct 58 ms 200 KB Output is correct
19 Correct 1 ms 284 KB Output is correct
20 Correct 13 ms 200 KB Output is correct
21 Correct 19 ms 260 KB Output is correct
22 Correct 4 ms 200 KB Output is correct
23 Correct 1 ms 200 KB Output is correct
24 Correct 2 ms 288 KB Output is correct
25 Correct 24 ms 200 KB Output is correct
26 Correct 25 ms 200 KB Output is correct
27 Correct 1 ms 276 KB Output is correct
28 Correct 41 ms 200 KB Output is correct
29 Correct 13 ms 320 KB Output is correct
30 Correct 39 ms 200 KB Output is correct
31 Correct 1 ms 280 KB Output is correct
32 Correct 6 ms 200 KB Output is correct
33 Correct 1 ms 200 KB Output is correct
34 Correct 16 ms 260 KB Output is correct
35 Correct 1 ms 280 KB Output is correct
36 Correct 10 ms 280 KB Output is correct
37 Correct 2 ms 200 KB Output is correct
38 Correct 1 ms 200 KB Output is correct
39 Correct 21 ms 200 KB Output is correct
40 Correct 31 ms 200 KB Output is correct
41 Correct 11 ms 264 KB Output is correct
42 Correct 31 ms 200 KB Output is correct
43 Correct 19 ms 200 KB Output is correct
44 Correct 20 ms 284 KB Output is correct
45 Correct 6 ms 276 KB Output is correct
46 Correct 1 ms 276 KB Output is correct
47 Correct 8 ms 280 KB Output is correct
48 Correct 15 ms 328 KB Output is correct
49 Correct 4 ms 284 KB Output is correct
50 Correct 20 ms 284 KB Output is correct
51 Correct 9 ms 320 KB Output is correct
52 Correct 2 ms 200 KB Output is correct
53 Correct 1 ms 276 KB Output is correct
54 Correct 20 ms 200 KB Output is correct
55 Correct 1 ms 200 KB Output is correct
56 Correct 21 ms 276 KB Output is correct
57 Correct 37 ms 200 KB Output is correct
58 Correct 16 ms 320 KB Output is correct
59 Correct 28 ms 200 KB Output is correct
60 Correct 24 ms 200 KB Output is correct
61 Correct 2 ms 200 KB Output is correct
62 Correct 1 ms 200 KB Output is correct
63 Correct 3 ms 284 KB Output is correct
64 Correct 2 ms 284 KB Output is correct
65 Correct 2 ms 288 KB Output is correct
66 Correct 6 ms 200 KB Output is correct
67 Correct 2 ms 272 KB Output is correct
68 Correct 2 ms 200 KB Output is correct
69 Correct 4 ms 264 KB Output is correct
70 Correct 4 ms 200 KB Output is correct
71 Correct 52 ms 200 KB Output is correct
72 Correct 5 ms 200 KB Output is correct
73 Correct 40 ms 204 KB Output is correct
74 Correct 46 ms 200 KB Output is correct
75 Correct 3 ms 200 KB Output is correct
76 Correct 30 ms 200 KB Output is correct
77 Correct 35 ms 200 KB Output is correct
78 Correct 6 ms 200 KB Output is correct
79 Correct 20 ms 200 KB Output is correct
80 Correct 48 ms 200 KB Output is correct
81 Correct 49 ms 200 KB Output is correct
82 Correct 20 ms 280 KB Output is correct
83 Correct 1 ms 200 KB Output is correct
84 Correct 40 ms 200 KB Output is correct
85 Correct 55 ms 200 KB Output is correct
86 Correct 6 ms 200 KB Output is correct
87 Correct 2 ms 200 KB Output is correct
88 Correct 9 ms 200 KB Output is correct
89 Correct 4 ms 200 KB Output is correct
90 Correct 1 ms 200 KB Output is correct
91 Correct 10 ms 200 KB Output is correct
92 Correct 3 ms 200 KB Output is correct
93 Correct 4 ms 200 KB Output is correct
94 Correct 5 ms 200 KB Output is correct
95 Correct 5 ms 200 KB Output is correct
96 Correct 4 ms 200 KB Output is correct
97 Correct 1 ms 200 KB Output is correct