#include "prize.h"
#include <bits/stdc++.h>
#define P pair<int,int>
using namespace std;
const int maxn = 200100;
bool visited[maxn];
int q[maxn][2];
int max_sum, ind;
P query(int i) {
if(visited[i]) return {q[i][0], q[i][1]};
visited[i] = true;
vector<int>curr = ask(i);
q[i][0] = curr[0];
q[i][1] = curr[1];
return {q[i][0], q[i][1]};
}
int sum(int i) {
query(i);
return q[i][0] + q[i][1];
}
void solve(int l, int r) {
//cout<<l<<" "<<r<<"\n";
if(l > r || ind != -1) return;
P ql = query(l);
P qr = query(r);
if(ql.first + ql.second == 0) {
ind = l;
return;
}
if(qr.first + qr.second == 0) {
ind = r;
return;
}
if(ql.second == 0 || qr.first == 0) return;
if(l == r) return;
if(ql.first + ql.second != max_sum) {
solve(l+1, r);
return;
}
if(qr.first + qr.second != max_sum) {
solve(l, r-1);
return;
}
int between = qr.first - ql.first;
if(between == 0) return;
int mid = (l + r) / 2;
solve(l, mid);
solve(mid+1, r);
}
int find_best(int n) {
ind = -1;
int b = sqrt(n) + 1;
b = min(n, b);
mt19937 g(chrono::high_resolution_clock::now().time_since_epoch().count());
uniform_int_distribution<int> uid(0, n - 1);
for(int i=0;i-b<n;i+=b) {
int x = min(i, n-1);
if(sum(x) == 0) return x;
max_sum = max(max_sum, sum(x));
} //max_sum = 1;
for(int i=0;i<100;i++) {
int pos = uid(g);
if(sum(pos) == 0) return pos;
max_sum = max(max_sum, sum(pos));
}
for(int l=0;l<n;l+=b) {
if(ind != -1) return ind;
int r = min(n-1, l+b-1);
solve(l, r);
}
return ind;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
7 ms |
2036 KB |
Output is correct |
| 2 |
Correct |
6 ms |
2036 KB |
Output is correct |
| 3 |
Correct |
9 ms |
2048 KB |
Output is correct |
| 4 |
Correct |
8 ms |
2040 KB |
Output is correct |
| 5 |
Correct |
11 ms |
2048 KB |
Output is correct |
| 6 |
Correct |
2 ms |
384 KB |
Output is correct |
| 7 |
Correct |
10 ms |
2040 KB |
Output is correct |
| 8 |
Correct |
5 ms |
2088 KB |
Output is correct |
| 9 |
Correct |
10 ms |
2040 KB |
Output is correct |
| 10 |
Correct |
9 ms |
2048 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
9 ms |
2048 KB |
Output is correct |
| 2 |
Correct |
5 ms |
2040 KB |
Output is correct |
| 3 |
Correct |
8 ms |
2152 KB |
Output is correct |
| 4 |
Correct |
4 ms |
2048 KB |
Output is correct |
| 5 |
Correct |
5 ms |
1980 KB |
Output is correct |
| 6 |
Correct |
2 ms |
256 KB |
Output is correct |
| 7 |
Correct |
20 ms |
1968 KB |
Output is correct |
| 8 |
Correct |
8 ms |
1976 KB |
Output is correct |
| 9 |
Correct |
11 ms |
2088 KB |
Output is correct |
| 10 |
Correct |
13 ms |
2048 KB |
Output is correct |
| 11 |
Correct |
14 ms |
2040 KB |
Output is correct |
| 12 |
Correct |
7 ms |
2040 KB |
Output is correct |
| 13 |
Correct |
8 ms |
2168 KB |
Output is correct |
| 14 |
Correct |
7 ms |
512 KB |
Output is correct |
| 15 |
Correct |
15 ms |
2040 KB |
Output is correct |
| 16 |
Partially correct |
61 ms |
2048 KB |
Partially correct - number of queries: 6402 |
| 17 |
Correct |
7 ms |
1976 KB |
Output is correct |
| 18 |
Partially correct |
47 ms |
2040 KB |
Partially correct - number of queries: 7605 |
| 19 |
Correct |
12 ms |
2048 KB |
Output is correct |
| 20 |
Correct |
9 ms |
1240 KB |
Output is correct |
| 21 |
Correct |
24 ms |
2040 KB |
Output is correct |
| 22 |
Correct |
12 ms |
2068 KB |
Output is correct |
| 23 |
Correct |
7 ms |
2040 KB |
Output is correct |
| 24 |
Correct |
5 ms |
2040 KB |
Output is correct |
| 25 |
Correct |
49 ms |
2040 KB |
Output is correct |
| 26 |
Correct |
38 ms |
1972 KB |
Output is correct |
| 27 |
Correct |
5 ms |
1972 KB |
Output is correct |
| 28 |
Partially correct |
58 ms |
1972 KB |
Partially correct - number of queries: 6629 |
| 29 |
Partially correct |
62 ms |
2040 KB |
Partially correct - number of queries: 5203 |
| 30 |
Partially correct |
57 ms |
2044 KB |
Partially correct - number of queries: 7588 |
| 31 |
Correct |
10 ms |
2040 KB |
Output is correct |
| 32 |
Correct |
11 ms |
2048 KB |
Output is correct |
| 33 |
Correct |
2 ms |
256 KB |
Output is correct |
| 34 |
Correct |
11 ms |
1972 KB |
Output is correct |
| 35 |
Correct |
6 ms |
2140 KB |
Output is correct |
| 36 |
Correct |
19 ms |
2040 KB |
Output is correct |
| 37 |
Correct |
5 ms |
2040 KB |
Output is correct |
| 38 |
Correct |
6 ms |
1960 KB |
Output is correct |
| 39 |
Correct |
24 ms |
2040 KB |
Output is correct |
| 40 |
Partially correct |
65 ms |
1976 KB |
Partially correct - number of queries: 6606 |
| 41 |
Correct |
17 ms |
2040 KB |
Output is correct |
| 42 |
Correct |
34 ms |
2040 KB |
Output is correct |
| 43 |
Correct |
27 ms |
2040 KB |
Output is correct |
| 44 |
Correct |
24 ms |
2040 KB |
Output is correct |
| 45 |
Correct |
11 ms |
2040 KB |
Output is correct |
| 46 |
Correct |
5 ms |
2168 KB |
Output is correct |
| 47 |
Correct |
35 ms |
2040 KB |
Output is correct |
| 48 |
Partially correct |
49 ms |
2040 KB |
Partially correct - number of queries: 5569 |
| 49 |
Correct |
11 ms |
2040 KB |
Output is correct |
| 50 |
Partially correct |
58 ms |
2040 KB |
Partially correct - number of queries: 7572 |
| 51 |
Correct |
22 ms |
2040 KB |
Output is correct |
| 52 |
Correct |
11 ms |
2048 KB |
Output is correct |
| 53 |
Correct |
12 ms |
2040 KB |
Output is correct |
| 54 |
Correct |
36 ms |
2048 KB |
Output is correct |
| 55 |
Correct |
9 ms |
2040 KB |
Output is correct |
| 56 |
Partially correct |
28 ms |
2048 KB |
Partially correct - number of queries: 7631 |
| 57 |
Partially correct |
39 ms |
2040 KB |
Partially correct - number of queries: 5579 |
| 58 |
Partially correct |
22 ms |
2040 KB |
Partially correct - number of queries: 5605 |
| 59 |
Correct |
29 ms |
2040 KB |
Output is correct |
| 60 |
Correct |
30 ms |
2040 KB |
Output is correct |
| 61 |
Correct |
9 ms |
2044 KB |
Output is correct |
| 62 |
Correct |
7 ms |
2040 KB |
Output is correct |
| 63 |
Correct |
14 ms |
2040 KB |
Output is correct |
| 64 |
Correct |
6 ms |
2040 KB |
Output is correct |
| 65 |
Correct |
13 ms |
2040 KB |
Output is correct |
| 66 |
Correct |
7 ms |
2068 KB |
Output is correct |
| 67 |
Correct |
7 ms |
2068 KB |
Output is correct |
| 68 |
Correct |
13 ms |
2040 KB |
Output is correct |
| 69 |
Correct |
17 ms |
1984 KB |
Output is correct |
| 70 |
Correct |
10 ms |
2168 KB |
Output is correct |
| 71 |
Partially correct |
76 ms |
2048 KB |
Partially correct - number of queries: 8021 |
| 72 |
Correct |
17 ms |
2060 KB |
Output is correct |
| 73 |
Partially correct |
62 ms |
2048 KB |
Partially correct - number of queries: 7932 |
| 74 |
Partially correct |
47 ms |
2048 KB |
Partially correct - number of queries: 7970 |
| 75 |
Correct |
13 ms |
2040 KB |
Output is correct |
| 76 |
Partially correct |
47 ms |
2040 KB |
Partially correct - number of queries: 6994 |
| 77 |
Partially correct |
37 ms |
2080 KB |
Partially correct - number of queries: 7281 |
| 78 |
Correct |
19 ms |
2040 KB |
Output is correct |
| 79 |
Correct |
45 ms |
2048 KB |
Output is correct |
| 80 |
Partially correct |
64 ms |
2040 KB |
Partially correct - number of queries: 7302 |
| 81 |
Partially correct |
49 ms |
2048 KB |
Partially correct - number of queries: 7322 |
| 82 |
Partially correct |
72 ms |
2048 KB |
Partially correct - number of queries: 7192 |
| 83 |
Correct |
11 ms |
2048 KB |
Output is correct |
| 84 |
Partially correct |
57 ms |
2048 KB |
Partially correct - number of queries: 6207 |
| 85 |
Partially correct |
55 ms |
2040 KB |
Partially correct - number of queries: 7407 |
| 86 |
Correct |
9 ms |
2088 KB |
Output is correct |
| 87 |
Correct |
10 ms |
2048 KB |
Output is correct |
| 88 |
Correct |
19 ms |
2048 KB |
Output is correct |
| 89 |
Correct |
9 ms |
2004 KB |
Output is correct |
| 90 |
Correct |
6 ms |
2060 KB |
Output is correct |
| 91 |
Correct |
7 ms |
2084 KB |
Output is correct |
| 92 |
Correct |
19 ms |
2048 KB |
Output is correct |
| 93 |
Correct |
19 ms |
2048 KB |
Output is correct |
| 94 |
Correct |
20 ms |
2048 KB |
Output is correct |
| 95 |
Correct |
13 ms |
2048 KB |
Output is correct |
| 96 |
Correct |
12 ms |
2048 KB |
Output is correct |
| 97 |
Correct |
19 ms |
2048 KB |
Output is correct |
