| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 290354 |
2020-09-03T16:17:29 Z |
A02 |
The Big Prize (IOI17_prize) |
C++14 |
|
97 ms |
11364 KB |
#include <bits/stdc++.h>
#include "prize.h"
using namespace std;
vector<vector<int> > asked;
vector<int> ask2(int i){
if (asked[i][0] == -1){
asked[i] = ask(i);
}
return asked[i];
}
int find_best(int n) {
asked = vector<vector<int> > (n, vector<int> (2, -1));
// if (n <= 5000){
// for (int i = 0; i < n; i++){
// vector<int> r = ask(i);
// if (r[0] == 0 && r[1] == 0){
// return i;
// }
// }
// }
int small_count = 0;
for (int i = 0; i < 500; i++){
int low = 0;
int high = n;
for (int a = 0; a < 9; a++){
small_count = max(small_count, ask2((low + high) / 2)[0] + ask2((low + high) / 2)[1]);
if (i & (1 << a)){
low = (low + high) / 2;
} else {
high = (low + high) / 2;
}
}
}
//vector<int> small_pos (small_count, -1);
//cout << small_count << endl;
for (int p = 0; p < small_count; p++){
//cout << endl;
//cout << 'p' << ' ' << p << endl;
int low = 0;
int high = n;
int left_elements = 0;
//pth small element in [0, n).
while (high != low + 1){
int mid = (low + high) / 2;
//cout << low << ' ' << high << ' ' << left_elements << endl;
while(ask2(mid)[0] + ask2(mid)[1] != small_count && mid - 1 >= low){
mid--;
}
int m_original = (low + high) / 2;
if (m_original != mid){
//cout << 'a' << endl;
if (ask2(mid)[0] + ask2(mid)[1] != small_count){
//cout << 'b' << endl;
int width = m_original - mid;
if (p < left_elements + width){
high = m_original;
} else {
low = m_original;
left_elements += width;
}
} else {
//cout << 'c' << endl;
//cout << mid << ' ' << m_original << endl;
int extra = m_original - mid;
int left_of_mid_elements = ask2(mid)[0] + extra - 1;
//cout << ' ' << left_of_mid_elements << endl;
if (left_of_mid_elements > p){
high = m_original;
} else {
low = m_original;
left_elements = left_of_mid_elements;
}
}
} else {
int left_of_mid_elements = ask2(mid)[0];
if (left_of_mid_elements > p){
high = mid;
} else {
low = mid;
left_elements = left_of_mid_elements;
}
}
}
//small_pos[p] = low;
//cout << p << ' ' << low << endl;
if (ask2(low)[0] + ask2(low)[1] == 0){
return low;
}
}
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
19 ms |
11256 KB |
Output is correct |
| 2 |
Correct |
18 ms |
11264 KB |
Output is correct |
| 3 |
Correct |
19 ms |
11256 KB |
Output is correct |
| 4 |
Correct |
23 ms |
11260 KB |
Output is correct |
| 5 |
Correct |
21 ms |
11264 KB |
Output is correct |
| 6 |
Correct |
22 ms |
11264 KB |
Output is correct |
| 7 |
Correct |
48 ms |
11264 KB |
Output is correct |
| 8 |
Correct |
22 ms |
11256 KB |
Output is correct |
| 9 |
Correct |
21 ms |
11256 KB |
Output is correct |
| 10 |
Correct |
20 ms |
11264 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
38 ms |
11256 KB |
Output is correct |
| 2 |
Correct |
21 ms |
11264 KB |
Output is correct |
| 3 |
Correct |
22 ms |
11256 KB |
Output is correct |
| 4 |
Correct |
19 ms |
11264 KB |
Output is correct |
| 5 |
Correct |
19 ms |
11256 KB |
Output is correct |
| 6 |
Correct |
23 ms |
11268 KB |
Output is correct |
| 7 |
Correct |
27 ms |
11264 KB |
Output is correct |
| 8 |
Correct |
21 ms |
11264 KB |
Output is correct |
| 9 |
Correct |
19 ms |
11264 KB |
Output is correct |
| 10 |
Correct |
33 ms |
11256 KB |
Output is correct |
| 11 |
Correct |
23 ms |
11264 KB |
Output is correct |
| 12 |
Correct |
19 ms |
11264 KB |
Output is correct |
| 13 |
Correct |
27 ms |
11256 KB |
Output is correct |
| 14 |
Correct |
7 ms |
1512 KB |
Output is correct |
| 15 |
Correct |
26 ms |
11256 KB |
Output is correct |
| 16 |
Correct |
63 ms |
11256 KB |
Output is correct |
| 17 |
Correct |
19 ms |
11256 KB |
Output is correct |
| 18 |
Correct |
63 ms |
11264 KB |
Output is correct |
| 19 |
Correct |
17 ms |
11240 KB |
Output is correct |
| 20 |
Correct |
22 ms |
5760 KB |
Output is correct |
| 21 |
Correct |
39 ms |
11264 KB |
Output is correct |
| 22 |
Correct |
20 ms |
11296 KB |
Output is correct |
| 23 |
Correct |
20 ms |
11256 KB |
Output is correct |
| 24 |
Correct |
34 ms |
11264 KB |
Output is correct |
| 25 |
Correct |
46 ms |
11264 KB |
Output is correct |
| 26 |
Correct |
43 ms |
11264 KB |
Output is correct |
| 27 |
Correct |
24 ms |
11256 KB |
Output is correct |
| 28 |
Correct |
54 ms |
11264 KB |
Output is correct |
| 29 |
Correct |
47 ms |
11256 KB |
Output is correct |
| 30 |
Correct |
55 ms |
11264 KB |
Output is correct |
| 31 |
Correct |
22 ms |
11256 KB |
Output is correct |
| 32 |
Correct |
23 ms |
11260 KB |
Output is correct |
| 33 |
Correct |
2 ms |
256 KB |
Output is correct |
| 34 |
Correct |
30 ms |
11264 KB |
Output is correct |
| 35 |
Correct |
19 ms |
11264 KB |
Output is correct |
| 36 |
Correct |
34 ms |
11264 KB |
Output is correct |
| 37 |
Correct |
22 ms |
11264 KB |
Output is correct |
| 38 |
Correct |
21 ms |
11264 KB |
Output is correct |
| 39 |
Correct |
47 ms |
11364 KB |
Output is correct |
| 40 |
Correct |
66 ms |
11264 KB |
Output is correct |
| 41 |
Correct |
51 ms |
11264 KB |
Output is correct |
| 42 |
Correct |
50 ms |
11264 KB |
Output is correct |
| 43 |
Correct |
46 ms |
11264 KB |
Output is correct |
| 44 |
Correct |
43 ms |
11264 KB |
Output is correct |
| 45 |
Correct |
25 ms |
11256 KB |
Output is correct |
| 46 |
Correct |
20 ms |
11264 KB |
Output is correct |
| 47 |
Correct |
44 ms |
11256 KB |
Output is correct |
| 48 |
Correct |
48 ms |
11256 KB |
Output is correct |
| 49 |
Correct |
21 ms |
11256 KB |
Output is correct |
| 50 |
Correct |
65 ms |
11264 KB |
Output is correct |
| 51 |
Correct |
53 ms |
11256 KB |
Output is correct |
| 52 |
Correct |
20 ms |
11264 KB |
Output is correct |
| 53 |
Correct |
20 ms |
11264 KB |
Output is correct |
| 54 |
Correct |
41 ms |
11256 KB |
Output is correct |
| 55 |
Correct |
20 ms |
11256 KB |
Output is correct |
| 56 |
Correct |
54 ms |
11264 KB |
Output is correct |
| 57 |
Correct |
47 ms |
11264 KB |
Output is correct |
| 58 |
Correct |
51 ms |
11256 KB |
Output is correct |
| 59 |
Correct |
52 ms |
11264 KB |
Output is correct |
| 60 |
Correct |
40 ms |
11296 KB |
Output is correct |
| 61 |
Correct |
24 ms |
11256 KB |
Output is correct |
| 62 |
Correct |
21 ms |
11248 KB |
Output is correct |
| 63 |
Correct |
19 ms |
11264 KB |
Output is correct |
| 64 |
Correct |
22 ms |
11264 KB |
Output is correct |
| 65 |
Correct |
20 ms |
11256 KB |
Output is correct |
| 66 |
Correct |
39 ms |
11256 KB |
Output is correct |
| 67 |
Correct |
20 ms |
11264 KB |
Output is correct |
| 68 |
Correct |
44 ms |
11264 KB |
Output is correct |
| 69 |
Correct |
36 ms |
11256 KB |
Output is correct |
| 70 |
Correct |
22 ms |
11256 KB |
Output is correct |
| 71 |
Correct |
79 ms |
11264 KB |
Output is correct |
| 72 |
Correct |
22 ms |
11264 KB |
Output is correct |
| 73 |
Correct |
69 ms |
11264 KB |
Output is correct |
| 74 |
Correct |
79 ms |
11256 KB |
Output is correct |
| 75 |
Correct |
22 ms |
11264 KB |
Output is correct |
| 76 |
Correct |
51 ms |
11264 KB |
Output is correct |
| 77 |
Correct |
65 ms |
11264 KB |
Output is correct |
| 78 |
Correct |
23 ms |
11264 KB |
Output is correct |
| 79 |
Correct |
42 ms |
11236 KB |
Output is correct |
| 80 |
Correct |
73 ms |
11264 KB |
Output is correct |
| 81 |
Correct |
60 ms |
11264 KB |
Output is correct |
| 82 |
Correct |
97 ms |
11264 KB |
Output is correct |
| 83 |
Correct |
22 ms |
11264 KB |
Output is correct |
| 84 |
Correct |
50 ms |
11264 KB |
Output is correct |
| 85 |
Correct |
79 ms |
11264 KB |
Output is correct |
| 86 |
Correct |
59 ms |
11264 KB |
Output is correct |
| 87 |
Correct |
25 ms |
11264 KB |
Output is correct |
| 88 |
Correct |
58 ms |
11264 KB |
Output is correct |
| 89 |
Correct |
59 ms |
11264 KB |
Output is correct |
| 90 |
Correct |
22 ms |
11264 KB |
Output is correct |
| 91 |
Correct |
28 ms |
11264 KB |
Output is correct |
| 92 |
Correct |
70 ms |
11264 KB |
Output is correct |
| 93 |
Correct |
66 ms |
11264 KB |
Output is correct |
| 94 |
Correct |
72 ms |
11264 KB |
Output is correct |
| 95 |
Correct |
89 ms |
11264 KB |
Output is correct |
| 96 |
Correct |
77 ms |
11264 KB |
Output is correct |
| 97 |
Correct |
70 ms |
11264 KB |
Output is correct |
