#include "prize.h"
#include <bits/stdc++.h>
#define all(x) (x).begin(), (x).end()
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<ll, ll> pll;
typedef pair<ull, ull> pull;
typedef pair<int, int> pii;
typedef pair<ld, ld> pld;
int ans = -1;
int curval;
vector<int> dp[200009];
vector<int> q(int x){
if(dp[x].size())
return dp[x];
return dp[x] = ask(x);
}
void binsearch(int l, int r, int lval, int rval){
int cnt = curval-lval-rval;
if(cnt == 0 || l > r || ans != -1)
return;
int mid = (l+r)/2;
for(int i = 0; (mid-i) >= l || (mid+i) <= r; ++i){
int extra = 0;
if(ans != -1 || cnt <= 0) return;
if((mid-i) >= l){
int id = (mid-i);
vector<int> res = q(id);
if(ans != -1) return;
if(res[0]+res[1] == curval){
binsearch(l, id-1, lval, res[1]);
binsearch(max(mid+i,mid+1), r, res[0]+extra, rval);
return;
}
else if(res[0]+res[1] == 0){
ans = id;
return;
}
else{
--cnt;
++extra;
}
}
if(ans != -1 || cnt <= 0) return;
if(i != 0 && (mid+i) <= r){
int id = mid+i;
vector<int> res = q(id);
if(ans != -1) return;
if(res[0]+res[1] == curval){
binsearch(l, mid-i-1, lval, res[1]+extra);
binsearch(id+1, r, res[0], rval);
return;
}
else if(res[0]+res[1] == 0){
ans = id;
return;
}
else{
--cnt;
++extra;
}
}
}
}
int find_best(int n) {
srand(time(NULL));
int times = 470;
while(times--){
vector<int> res = q(rand()%n);
curval = max(curval, res[0]+res[1]);
}
binsearch(0, n-1, 0, 0);
assert(ans != -1 && q(ans)[0] == 0 && q(ans)[1] == 0);
return ans;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
6 ms |
5076 KB |
Output is correct |
| 2 |
Correct |
9 ms |
5072 KB |
Output is correct |
| 3 |
Correct |
10 ms |
4992 KB |
Output is correct |
| 4 |
Correct |
6 ms |
5072 KB |
Output is correct |
| 5 |
Correct |
10 ms |
4992 KB |
Output is correct |
| 6 |
Correct |
9 ms |
4992 KB |
Output is correct |
| 7 |
Correct |
8 ms |
4992 KB |
Output is correct |
| 8 |
Correct |
8 ms |
4992 KB |
Output is correct |
| 9 |
Correct |
10 ms |
4992 KB |
Output is correct |
| 10 |
Correct |
13 ms |
4992 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
9 ms |
4992 KB |
Output is correct |
| 2 |
Correct |
9 ms |
5056 KB |
Output is correct |
| 3 |
Correct |
9 ms |
4992 KB |
Output is correct |
| 4 |
Correct |
9 ms |
4992 KB |
Output is correct |
| 5 |
Correct |
11 ms |
4992 KB |
Output is correct |
| 6 |
Correct |
10 ms |
4992 KB |
Output is correct |
| 7 |
Correct |
7 ms |
5076 KB |
Output is correct |
| 8 |
Correct |
8 ms |
4992 KB |
Output is correct |
| 9 |
Correct |
8 ms |
5068 KB |
Output is correct |
| 10 |
Correct |
10 ms |
4992 KB |
Output is correct |
| 11 |
Correct |
10 ms |
4992 KB |
Output is correct |
| 12 |
Correct |
10 ms |
4992 KB |
Output is correct |
| 13 |
Correct |
11 ms |
4992 KB |
Output is correct |
| 14 |
Correct |
11 ms |
4992 KB |
Output is correct |
| 15 |
Correct |
13 ms |
4992 KB |
Output is correct |
| 16 |
Correct |
48 ms |
5240 KB |
Output is correct |
| 17 |
Correct |
11 ms |
4992 KB |
Output is correct |
| 18 |
Correct |
47 ms |
5112 KB |
Output is correct |
| 19 |
Correct |
10 ms |
4992 KB |
Output is correct |
| 20 |
Correct |
20 ms |
4992 KB |
Output is correct |
| 21 |
Correct |
29 ms |
5112 KB |
Output is correct |
| 22 |
Correct |
12 ms |
4992 KB |
Output is correct |
| 23 |
Correct |
9 ms |
4992 KB |
Output is correct |
| 24 |
Correct |
8 ms |
4992 KB |
Output is correct |
| 25 |
Correct |
27 ms |
5120 KB |
Output is correct |
| 26 |
Correct |
26 ms |
5244 KB |
Output is correct |
| 27 |
Correct |
9 ms |
4992 KB |
Output is correct |
| 28 |
Correct |
50 ms |
5112 KB |
Output is correct |
| 29 |
Correct |
35 ms |
5112 KB |
Output is correct |
| 30 |
Correct |
44 ms |
5112 KB |
Output is correct |
| 31 |
Correct |
8 ms |
4992 KB |
Output is correct |
| 32 |
Correct |
11 ms |
4992 KB |
Output is correct |
| 33 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 34 |
Correct |
21 ms |
5112 KB |
Output is correct |
| 35 |
Correct |
9 ms |
4992 KB |
Output is correct |
| 36 |
Correct |
11 ms |
5156 KB |
Output is correct |
| 37 |
Correct |
11 ms |
5112 KB |
Output is correct |
| 38 |
Correct |
8 ms |
4992 KB |
Output is correct |
| 39 |
Correct |
28 ms |
5120 KB |
Output is correct |
| 40 |
Correct |
54 ms |
5112 KB |
Output is correct |
| 41 |
Correct |
37 ms |
5112 KB |
Output is correct |
| 42 |
Correct |
21 ms |
5168 KB |
Output is correct |
| 43 |
Correct |
30 ms |
5140 KB |
Output is correct |
| 44 |
Correct |
29 ms |
5112 KB |
Output is correct |
| 45 |
Correct |
24 ms |
5120 KB |
Output is correct |
| 46 |
Correct |
10 ms |
4992 KB |
Output is correct |
| 47 |
Correct |
18 ms |
5160 KB |
Output is correct |
| 48 |
Correct |
44 ms |
5112 KB |
Output is correct |
| 49 |
Correct |
8 ms |
5144 KB |
Output is correct |
| 50 |
Correct |
46 ms |
5240 KB |
Output is correct |
| 51 |
Correct |
25 ms |
5112 KB |
Output is correct |
| 52 |
Correct |
10 ms |
4992 KB |
Output is correct |
| 53 |
Correct |
9 ms |
4992 KB |
Output is correct |
| 54 |
Correct |
23 ms |
5112 KB |
Output is correct |
| 55 |
Correct |
9 ms |
4992 KB |
Output is correct |
| 56 |
Correct |
46 ms |
5112 KB |
Output is correct |
| 57 |
Correct |
37 ms |
5240 KB |
Output is correct |
| 58 |
Correct |
46 ms |
5060 KB |
Output is correct |
| 59 |
Correct |
24 ms |
5200 KB |
Output is correct |
| 60 |
Correct |
36 ms |
5112 KB |
Output is correct |
| 61 |
Correct |
11 ms |
4992 KB |
Output is correct |
| 62 |
Correct |
8 ms |
4992 KB |
Output is correct |
| 63 |
Correct |
7 ms |
5092 KB |
Output is correct |
| 64 |
Correct |
8 ms |
4992 KB |
Output is correct |
| 65 |
Correct |
10 ms |
4992 KB |
Output is correct |
| 66 |
Correct |
14 ms |
4992 KB |
Output is correct |
| 67 |
Correct |
8 ms |
4992 KB |
Output is correct |
| 68 |
Correct |
11 ms |
4992 KB |
Output is correct |
| 69 |
Correct |
15 ms |
4992 KB |
Output is correct |
| 70 |
Correct |
10 ms |
4992 KB |
Output is correct |
| 71 |
Partially correct |
54 ms |
5112 KB |
Partially correct - number of queries: 5205 |
| 72 |
Correct |
12 ms |
4992 KB |
Output is correct |
| 73 |
Partially correct |
61 ms |
5248 KB |
Partially correct - number of queries: 5144 |
| 74 |
Partially correct |
62 ms |
5248 KB |
Partially correct - number of queries: 5179 |
| 75 |
Correct |
11 ms |
4992 KB |
Output is correct |
| 76 |
Correct |
55 ms |
5176 KB |
Output is correct |
| 77 |
Correct |
31 ms |
5196 KB |
Output is correct |
| 78 |
Correct |
14 ms |
4992 KB |
Output is correct |
| 79 |
Correct |
27 ms |
5112 KB |
Output is correct |
| 80 |
Correct |
60 ms |
5112 KB |
Output is correct |
| 81 |
Correct |
56 ms |
5112 KB |
Output is correct |
| 82 |
Correct |
42 ms |
5112 KB |
Output is correct |
| 83 |
Correct |
9 ms |
4992 KB |
Output is correct |
| 84 |
Correct |
39 ms |
5120 KB |
Output is correct |
| 85 |
Correct |
28 ms |
5128 KB |
Output is correct |
| 86 |
Correct |
51 ms |
5112 KB |
Output is correct |
| 87 |
Correct |
11 ms |
4992 KB |
Output is correct |
| 88 |
Correct |
39 ms |
5112 KB |
Output is correct |
| 89 |
Correct |
33 ms |
5112 KB |
Output is correct |
| 90 |
Correct |
10 ms |
4992 KB |
Output is correct |
| 91 |
Correct |
16 ms |
5112 KB |
Output is correct |
| 92 |
Correct |
15 ms |
5128 KB |
Output is correct |
| 93 |
Correct |
26 ms |
5176 KB |
Output is correct |
| 94 |
Correct |
40 ms |
5132 KB |
Output is correct |
| 95 |
Correct |
42 ms |
5240 KB |
Output is correct |
| 96 |
Correct |
36 ms |
5112 KB |
Output is correct |
| 97 |
Correct |
44 ms |
5136 KB |
Output is correct |
