#include "prize.h"
#include <bits/stdc++.h>
using namespace std;
vector<int> memoiz[200005];
int key = -1;
vector<int> customAsk(int x){
// Memoized version of ask
if(memoiz[x].empty()) memoiz[x] = ask(x);
key = max(key, memoiz[x][0] + memoiz[x][1]);
return memoiz[x];
}
int solve(int l, int r, int offsL = 0, int offsR = 0){
if(l > r) return -1;
if(l == r) return customAsk(l)[0] + customAsk(l)[1] == 0 ? l : -1;
int m = (l+r)/2;
vector<int> res = customAsk(m);
while(res[0] + res[1] != key){
if(res[0] + res[1] == 0) return m;
if(m == r) break;
m++;
res = customAsk(m);
}
if(m == r){
m = (l+r)/2;
while(res[0] + res[1] != key){
if(res[0] + res[1] == 0) return m;
if(m == l) return -1;
m--;
res = customAsk(m);
}
}
int left = -1;
if(res[0] - offsL > 0) left = solve(l, m-1, offsL, res[1]);
if(left != -1) return left;
if(res[1] - offsR > 0) return solve(m+1, r, res[0], offsR);
return -1;
}
void popularPreprocess(int l, int r, int& left, int dep = 0){
if(l >= r) return;
if(left <= 0) return;
int m = (l+r)/2;
customAsk(m);
left--;
popularPreprocess(l, m-1, left);
if(dep > 3)
popularPreprocess(m+1, r, left);
}
int find_best(int n) {
if(n < 5000){
for(int i = 0; i < n; i++) {
vector<int> res = customAsk(i);
if(res[0] + res[1] == 0)
return i;
}
}
int cntr = sqrt(n);
popularPreprocess(0, n-1, cntr);
int ans = solve(0, n-1);
for(int i = 0; i < n; i++) memoiz[i].clear();
return ans;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
4992 KB |
Output is correct |
| 2 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 3 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 4 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 5 |
Correct |
5 ms |
4992 KB |
Output is correct |
| 6 |
Correct |
5 ms |
5108 KB |
Output is correct |
| 7 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 8 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 9 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 10 |
Correct |
4 ms |
4992 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
4 ms |
5064 KB |
Output is correct |
| 2 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 3 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 4 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 5 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 6 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 7 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 8 |
Correct |
4 ms |
5112 KB |
Output is correct |
| 9 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 10 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 11 |
Correct |
6 ms |
4992 KB |
Output is correct |
| 12 |
Correct |
4 ms |
5024 KB |
Output is correct |
| 13 |
Correct |
11 ms |
4992 KB |
Output is correct |
| 14 |
Correct |
6 ms |
4992 KB |
Output is correct |
| 15 |
Correct |
11 ms |
4992 KB |
Output is correct |
| 16 |
Correct |
41 ms |
5184 KB |
Output is correct |
| 17 |
Correct |
5 ms |
4992 KB |
Output is correct |
| 18 |
Correct |
55 ms |
5240 KB |
Output is correct |
| 19 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 20 |
Correct |
18 ms |
4992 KB |
Output is correct |
| 21 |
Correct |
21 ms |
5088 KB |
Output is correct |
| 22 |
Correct |
7 ms |
4992 KB |
Output is correct |
| 23 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 24 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 25 |
Correct |
27 ms |
5112 KB |
Output is correct |
| 26 |
Correct |
25 ms |
5368 KB |
Output is correct |
| 27 |
Correct |
5 ms |
4992 KB |
Output is correct |
| 28 |
Correct |
26 ms |
5176 KB |
Output is correct |
| 29 |
Correct |
20 ms |
5160 KB |
Output is correct |
| 30 |
Correct |
39 ms |
5112 KB |
Output is correct |
| 31 |
Correct |
4 ms |
5120 KB |
Output is correct |
| 32 |
Correct |
8 ms |
5120 KB |
Output is correct |
| 33 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 34 |
Correct |
20 ms |
4992 KB |
Output is correct |
| 35 |
Correct |
5 ms |
4992 KB |
Output is correct |
| 36 |
Correct |
12 ms |
4992 KB |
Output is correct |
| 37 |
Correct |
5 ms |
4992 KB |
Output is correct |
| 38 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 39 |
Correct |
21 ms |
5056 KB |
Output is correct |
| 40 |
Correct |
49 ms |
5112 KB |
Output is correct |
| 41 |
Correct |
33 ms |
5112 KB |
Output is correct |
| 42 |
Correct |
25 ms |
5112 KB |
Output is correct |
| 43 |
Correct |
21 ms |
5140 KB |
Output is correct |
| 44 |
Correct |
25 ms |
5112 KB |
Output is correct |
| 45 |
Correct |
17 ms |
5116 KB |
Output is correct |
| 46 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 47 |
Correct |
15 ms |
5152 KB |
Output is correct |
| 48 |
Correct |
35 ms |
5112 KB |
Output is correct |
| 49 |
Correct |
7 ms |
4992 KB |
Output is correct |
| 50 |
Correct |
45 ms |
5156 KB |
Output is correct |
| 51 |
Correct |
14 ms |
5164 KB |
Output is correct |
| 52 |
Correct |
5 ms |
4992 KB |
Output is correct |
| 53 |
Correct |
5 ms |
4992 KB |
Output is correct |
| 54 |
Correct |
26 ms |
5112 KB |
Output is correct |
| 55 |
Correct |
5 ms |
4992 KB |
Output is correct |
| 56 |
Correct |
46 ms |
5112 KB |
Output is correct |
| 57 |
Correct |
30 ms |
5112 KB |
Output is correct |
| 58 |
Correct |
36 ms |
5088 KB |
Output is correct |
| 59 |
Correct |
27 ms |
5112 KB |
Output is correct |
| 60 |
Correct |
24 ms |
5144 KB |
Output is correct |
| 61 |
Correct |
6 ms |
4992 KB |
Output is correct |
| 62 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 63 |
Correct |
5 ms |
4992 KB |
Output is correct |
| 64 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 65 |
Correct |
5 ms |
4992 KB |
Output is correct |
| 66 |
Correct |
8 ms |
4992 KB |
Output is correct |
| 67 |
Correct |
8 ms |
4992 KB |
Output is correct |
| 68 |
Correct |
5 ms |
4992 KB |
Output is correct |
| 69 |
Correct |
7 ms |
4992 KB |
Output is correct |
| 70 |
Correct |
8 ms |
5060 KB |
Output is correct |
| 71 |
Correct |
40 ms |
5112 KB |
Output is correct |
| 72 |
Correct |
8 ms |
4992 KB |
Output is correct |
| 73 |
Correct |
50 ms |
5112 KB |
Output is correct |
| 74 |
Correct |
36 ms |
5252 KB |
Output is correct |
| 75 |
Correct |
6 ms |
4992 KB |
Output is correct |
| 76 |
Correct |
44 ms |
5112 KB |
Output is correct |
| 77 |
Correct |
43 ms |
5120 KB |
Output is correct |
| 78 |
Correct |
9 ms |
4992 KB |
Output is correct |
| 79 |
Correct |
26 ms |
5112 KB |
Output is correct |
| 80 |
Correct |
44 ms |
5116 KB |
Output is correct |
| 81 |
Correct |
43 ms |
5300 KB |
Output is correct |
| 82 |
Correct |
47 ms |
5112 KB |
Output is correct |
| 83 |
Correct |
5 ms |
4992 KB |
Output is correct |
| 84 |
Correct |
40 ms |
5120 KB |
Output is correct |
| 85 |
Correct |
50 ms |
5240 KB |
Output is correct |
| 86 |
Correct |
9 ms |
4992 KB |
Output is correct |
| 87 |
Correct |
5 ms |
4992 KB |
Output is correct |
| 88 |
Correct |
9 ms |
5080 KB |
Output is correct |
| 89 |
Correct |
9 ms |
4992 KB |
Output is correct |
| 90 |
Correct |
5 ms |
4992 KB |
Output is correct |
| 91 |
Correct |
8 ms |
4992 KB |
Output is correct |
| 92 |
Correct |
8 ms |
4992 KB |
Output is correct |
| 93 |
Correct |
8 ms |
4992 KB |
Output is correct |
| 94 |
Correct |
7 ms |
4992 KB |
Output is correct |
| 95 |
Correct |
9 ms |
4992 KB |
Output is correct |
| 96 |
Correct |
7 ms |
4992 KB |
Output is correct |
| 97 |
Correct |
4 ms |
4992 KB |
Output is correct |
