#include <bits/stdc++.h>
#include "prize.h"
using namespace std;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int int_rand(int a, int b){
return uniform_int_distribution<int>(a, b)(rng);
}
const int TRYMAX = 450, K = 1600, DIFF = 10000;
int maxcnt = 0;
map<int, vector<int>> mp;
vector<int> query(int pos){
if(mp.find(pos) == mp.end()) mp[pos] = ask(pos);
return mp[pos];
}
int find_best(int n){
set<int> st;
while(st.size() < n && st.size() < TRYMAX) st.insert(int_rand(0, n - 1));
for(auto i : st){
vector<int> vec = query(i);
maxcnt = max(maxcnt, vec[0] + vec[1]);
}
vector<bool> ismax(n, false);
int pos = 0, prefix = 0;
while(pos < n){
vector<int> vec = query(pos);
if(vec[0] + vec[1] != maxcnt){
pos++;
continue;
}
int l = pos - 1, r = min(pos + K, n);
while(r - l > 1){
int m = l + (r - l) / 2;
auto it = mp.lower_bound(m);
int m2 = m;
if(it != mp.end()){
if(it->first > l && it->first < r && abs(it->first - m) <= DIFF) m2 = it->first;
}
if(it != mp.begin()){
if(prev(it)->first > l && prev(it)->first < r && abs(prev(it)->first - m) <= DIFF) m2 = prev(it)->first;
}
m = m2;
vector<int> vec = query(m);
if(vec[0] + vec[1] == maxcnt && (m + 1 - vec[0]) - prefix == m - pos + 1) l = m;
else r = m;
}
prefix += (l - pos + 1);
for(int i = pos; i <= l; i++) ismax[i] = true;
pos = max(pos + 1, l + 1);
}
for(int i = 0; i < n; i++){
if(!ismax[i]){
vector<int> vec = query(i);
if(vec[0] + vec[1] == 0) return i;
}
}
return -1;
}
Compilation message
prize.cpp: In function 'int find_best(int)':
prize.cpp:27:18: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
27 | while(st.size() < n && st.size() < TRYMAX) st.insert(int_rand(0, n - 1));
| ~~~~~~~~~~^~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
14 ms |
456 KB |
Output is correct |
| 2 |
Correct |
20 ms |
412 KB |
Output is correct |
| 3 |
Correct |
15 ms |
480 KB |
Output is correct |
| 4 |
Correct |
25 ms |
560 KB |
Output is correct |
| 5 |
Correct |
17 ms |
540 KB |
Output is correct |
| 6 |
Correct |
18 ms |
412 KB |
Output is correct |
| 7 |
Correct |
17 ms |
472 KB |
Output is correct |
| 8 |
Correct |
8 ms |
508 KB |
Output is correct |
| 9 |
Correct |
21 ms |
416 KB |
Output is correct |
| 10 |
Correct |
17 ms |
584 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
14 ms |
420 KB |
Output is correct |
| 2 |
Correct |
12 ms |
420 KB |
Output is correct |
| 3 |
Correct |
8 ms |
592 KB |
Output is correct |
| 4 |
Correct |
13 ms |
476 KB |
Output is correct |
| 5 |
Correct |
14 ms |
436 KB |
Output is correct |
| 6 |
Correct |
11 ms |
584 KB |
Output is correct |
| 7 |
Correct |
20 ms |
392 KB |
Output is correct |
| 8 |
Correct |
13 ms |
400 KB |
Output is correct |
| 9 |
Correct |
15 ms |
436 KB |
Output is correct |
| 10 |
Correct |
12 ms |
464 KB |
Output is correct |
| 11 |
Correct |
18 ms |
516 KB |
Output is correct |
| 12 |
Correct |
9 ms |
500 KB |
Output is correct |
| 13 |
Correct |
16 ms |
456 KB |
Output is correct |
| 14 |
Correct |
9 ms |
364 KB |
Output is correct |
| 15 |
Correct |
51 ms |
772 KB |
Output is correct |
| 16 |
Correct |
30 ms |
800 KB |
Output is correct |
| 17 |
Correct |
51 ms |
848 KB |
Output is correct |
| 18 |
Correct |
54 ms |
840 KB |
Output is correct |
| 19 |
Correct |
47 ms |
772 KB |
Output is correct |
| 20 |
Correct |
22 ms |
676 KB |
Output is correct |
| 21 |
Correct |
50 ms |
812 KB |
Output is correct |
| 22 |
Correct |
47 ms |
684 KB |
Output is correct |
| 23 |
Correct |
17 ms |
400 KB |
Output is correct |
| 24 |
Correct |
19 ms |
464 KB |
Output is correct |
| 25 |
Correct |
49 ms |
740 KB |
Output is correct |
| 26 |
Correct |
64 ms |
824 KB |
Output is correct |
| 27 |
Correct |
19 ms |
448 KB |
Output is correct |
| 28 |
Correct |
25 ms |
760 KB |
Output is correct |
| 29 |
Correct |
41 ms |
668 KB |
Output is correct |
| 30 |
Correct |
52 ms |
820 KB |
Output is correct |
| 31 |
Correct |
41 ms |
780 KB |
Output is correct |
| 32 |
Correct |
15 ms |
448 KB |
Output is correct |
| 33 |
Correct |
2 ms |
312 KB |
Output is correct |
| 34 |
Correct |
23 ms |
864 KB |
Output is correct |
| 35 |
Correct |
19 ms |
488 KB |
Output is correct |
| 36 |
Correct |
28 ms |
864 KB |
Output is correct |
| 37 |
Correct |
20 ms |
432 KB |
Output is correct |
| 38 |
Correct |
18 ms |
480 KB |
Output is correct |
| 39 |
Correct |
59 ms |
772 KB |
Output is correct |
| 40 |
Correct |
45 ms |
792 KB |
Output is correct |
| 41 |
Correct |
53 ms |
912 KB |
Output is correct |
| 42 |
Correct |
62 ms |
772 KB |
Output is correct |
| 43 |
Correct |
32 ms |
792 KB |
Output is correct |
| 44 |
Correct |
22 ms |
860 KB |
Output is correct |
| 45 |
Correct |
49 ms |
768 KB |
Output is correct |
| 46 |
Correct |
62 ms |
820 KB |
Output is correct |
| 47 |
Correct |
42 ms |
724 KB |
Output is correct |
| 48 |
Correct |
38 ms |
932 KB |
Output is correct |
| 49 |
Correct |
49 ms |
800 KB |
Output is correct |
| 50 |
Correct |
41 ms |
840 KB |
Output is correct |
| 51 |
Correct |
45 ms |
788 KB |
Output is correct |
| 52 |
Correct |
43 ms |
844 KB |
Output is correct |
| 53 |
Correct |
14 ms |
408 KB |
Output is correct |
| 54 |
Correct |
42 ms |
772 KB |
Output is correct |
| 55 |
Correct |
44 ms |
840 KB |
Output is correct |
| 56 |
Correct |
42 ms |
820 KB |
Output is correct |
| 57 |
Correct |
64 ms |
840 KB |
Output is correct |
| 58 |
Correct |
58 ms |
800 KB |
Output is correct |
| 59 |
Correct |
41 ms |
840 KB |
Output is correct |
| 60 |
Correct |
56 ms |
832 KB |
Output is correct |
| 61 |
Correct |
8 ms |
508 KB |
Output is correct |
| 62 |
Correct |
18 ms |
416 KB |
Output is correct |
| 63 |
Correct |
17 ms |
412 KB |
Output is correct |
| 64 |
Correct |
16 ms |
504 KB |
Output is correct |
| 65 |
Correct |
18 ms |
488 KB |
Output is correct |
| 66 |
Correct |
13 ms |
548 KB |
Output is correct |
| 67 |
Correct |
12 ms |
548 KB |
Output is correct |
| 68 |
Correct |
11 ms |
552 KB |
Output is correct |
| 69 |
Correct |
22 ms |
476 KB |
Output is correct |
| 70 |
Correct |
22 ms |
456 KB |
Output is correct |
| 71 |
Correct |
53 ms |
844 KB |
Output is correct |
| 72 |
Correct |
23 ms |
404 KB |
Output is correct |
| 73 |
Correct |
52 ms |
788 KB |
Output is correct |
| 74 |
Correct |
50 ms |
760 KB |
Output is correct |
| 75 |
Correct |
24 ms |
484 KB |
Output is correct |
| 76 |
Correct |
37 ms |
740 KB |
Output is correct |
| 77 |
Partially correct |
44 ms |
860 KB |
Partially correct - number of queries: 5063 |
| 78 |
Correct |
20 ms |
468 KB |
Output is correct |
| 79 |
Correct |
35 ms |
636 KB |
Output is correct |
| 80 |
Partially correct |
48 ms |
784 KB |
Partially correct - number of queries: 5086 |
| 81 |
Partially correct |
29 ms |
824 KB |
Partially correct - number of queries: 5087 |
| 82 |
Partially correct |
44 ms |
864 KB |
Partially correct - number of queries: 5019 |
| 83 |
Correct |
17 ms |
452 KB |
Output is correct |
| 84 |
Correct |
32 ms |
692 KB |
Output is correct |
| 85 |
Partially correct |
35 ms |
916 KB |
Partially correct - number of queries: 5091 |
| 86 |
Correct |
42 ms |
752 KB |
Output is correct |
| 87 |
Correct |
19 ms |
440 KB |
Output is correct |
| 88 |
Correct |
42 ms |
648 KB |
Output is correct |
| 89 |
Correct |
39 ms |
656 KB |
Output is correct |
| 90 |
Correct |
15 ms |
456 KB |
Output is correct |
| 91 |
Correct |
32 ms |
596 KB |
Output is correct |
| 92 |
Correct |
42 ms |
672 KB |
Output is correct |
| 93 |
Correct |
48 ms |
864 KB |
Output is correct |
| 94 |
Correct |
38 ms |
820 KB |
Output is correct |
| 95 |
Correct |
44 ms |
848 KB |
Output is correct |
| 96 |
Correct |
58 ms |
868 KB |
Output is correct |
| 97 |
Correct |
23 ms |
832 KB |
Output is correct |
