#include <bits/stdc++.h>
#include "prize.h"
using namespace std;
typedef pair<int, int> pii;
int sq, mxcnt, ans;
map<int, int> mp[2];
pii myask(int pos)
{
if(mp[0].count(pos))
return {mp[0][pos], mp[1][pos]};
auto v = ask(pos);
mp[0][pos] = v[0];
mp[1][pos] = v[1];
return {v[0], v[1]};
}
void solve(int st, int dr)
{
if(st > dr) return;
if(ans != -1) return;
auto askst = myask(st);
auto askdr = myask(dr);
int sumst = askst.first + askst.second;
int sumdr = askdr.first + askdr.second;
if(sumst == 0) { ans = st; return; }
if(sumdr == 0) { ans = dr; return; }
if(askst.second == 0 || askdr.first == 0) return;
if(dr - st <= 1) return;
if(sumst != mxcnt)
{
solve(st + 1, dr);
return;
}
if(sumdr != mxcnt)
{
solve(st, dr - 1);
return;
}
int cnt = askdr.first - askst.first;
if(cnt == 0) return;
int lgt = dr - st - 1;
int mij = st + (dr - st) / 2;
solve(st, mij);
solve(mij, dr);
}
int find_best(int N)
{
ans = -1;
sq = sqrt(N) + 1;
sq = min(sq, N);
mxcnt = 0;
for(int i = 0; i < 2 * sq; i++)
{
auto x = myask(i);
int sum = x.first + x.second;
if(sum == 0) ans = i;
mxcnt = max(mxcnt, sum);
}
int st = 0, dr = sq;
for(; st < N; )
{
solve(st, dr);
st += sq; dr += sq;
if(dr >= N) dr = N - 1;
}
return ans;
}
Compilation message
prize.cpp: In function 'void solve(int, int)':
prize.cpp:55:9: warning: unused variable 'lgt' [-Wunused-variable]
int lgt = dr - st - 1;
^~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
12 ms |
388 KB |
Output is correct |
2 |
Correct |
13 ms |
504 KB |
Output is correct |
3 |
Correct |
10 ms |
500 KB |
Output is correct |
4 |
Correct |
24 ms |
376 KB |
Output is correct |
5 |
Correct |
14 ms |
412 KB |
Output is correct |
6 |
Correct |
14 ms |
308 KB |
Output is correct |
7 |
Correct |
8 ms |
488 KB |
Output is correct |
8 |
Correct |
14 ms |
416 KB |
Output is correct |
9 |
Correct |
8 ms |
416 KB |
Output is correct |
10 |
Correct |
16 ms |
376 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
7 ms |
560 KB |
Output is correct |
2 |
Correct |
14 ms |
376 KB |
Output is correct |
3 |
Correct |
8 ms |
496 KB |
Output is correct |
4 |
Correct |
18 ms |
376 KB |
Output is correct |
5 |
Correct |
9 ms |
416 KB |
Output is correct |
6 |
Correct |
11 ms |
376 KB |
Output is correct |
7 |
Correct |
7 ms |
488 KB |
Output is correct |
8 |
Correct |
11 ms |
392 KB |
Output is correct |
9 |
Correct |
10 ms |
416 KB |
Output is correct |
10 |
Correct |
20 ms |
424 KB |
Output is correct |
11 |
Correct |
8 ms |
416 KB |
Output is correct |
12 |
Correct |
12 ms |
376 KB |
Output is correct |
13 |
Correct |
21 ms |
360 KB |
Output is correct |
14 |
Correct |
7 ms |
256 KB |
Output is correct |
15 |
Correct |
12 ms |
532 KB |
Output is correct |
16 |
Correct |
39 ms |
712 KB |
Output is correct |
17 |
Correct |
11 ms |
412 KB |
Output is correct |
18 |
Partially correct |
67 ms |
788 KB |
Partially correct - number of queries: 5472 |
19 |
Correct |
11 ms |
376 KB |
Output is correct |
20 |
Correct |
25 ms |
504 KB |
Output is correct |
21 |
Correct |
14 ms |
544 KB |
Output is correct |
22 |
Correct |
18 ms |
444 KB |
Output is correct |
23 |
Correct |
11 ms |
392 KB |
Output is correct |
24 |
Correct |
12 ms |
376 KB |
Output is correct |
25 |
Correct |
15 ms |
576 KB |
Output is correct |
26 |
Correct |
31 ms |
552 KB |
Output is correct |
27 |
Correct |
13 ms |
380 KB |
Output is correct |
28 |
Correct |
48 ms |
784 KB |
Output is correct |
29 |
Correct |
39 ms |
832 KB |
Output is correct |
30 |
Partially correct |
64 ms |
784 KB |
Partially correct - number of queries: 5484 |
31 |
Correct |
13 ms |
340 KB |
Output is correct |
32 |
Correct |
20 ms |
504 KB |
Output is correct |
33 |
Correct |
3 ms |
256 KB |
Output is correct |
34 |
Correct |
20 ms |
508 KB |
Output is correct |
35 |
Correct |
8 ms |
536 KB |
Output is correct |
36 |
Correct |
21 ms |
364 KB |
Output is correct |
37 |
Correct |
14 ms |
376 KB |
Output is correct |
38 |
Correct |
12 ms |
384 KB |
Output is correct |
39 |
Correct |
19 ms |
588 KB |
Output is correct |
40 |
Correct |
47 ms |
740 KB |
Output is correct |
41 |
Correct |
22 ms |
696 KB |
Output is correct |
42 |
Correct |
36 ms |
552 KB |
Output is correct |
43 |
Correct |
18 ms |
616 KB |
Output is correct |
44 |
Correct |
22 ms |
548 KB |
Output is correct |
45 |
Correct |
30 ms |
424 KB |
Output is correct |
46 |
Correct |
7 ms |
560 KB |
Output is correct |
47 |
Correct |
29 ms |
556 KB |
Output is correct |
48 |
Correct |
48 ms |
504 KB |
Output is correct |
49 |
Correct |
17 ms |
384 KB |
Output is correct |
50 |
Partially correct |
70 ms |
728 KB |
Partially correct - number of queries: 5477 |
51 |
Correct |
26 ms |
508 KB |
Output is correct |
52 |
Correct |
10 ms |
396 KB |
Output is correct |
53 |
Correct |
19 ms |
316 KB |
Output is correct |
54 |
Correct |
31 ms |
552 KB |
Output is correct |
55 |
Correct |
6 ms |
448 KB |
Output is correct |
56 |
Partially correct |
35 ms |
1012 KB |
Partially correct - number of queries: 5480 |
57 |
Correct |
20 ms |
712 KB |
Output is correct |
58 |
Correct |
26 ms |
728 KB |
Output is correct |
59 |
Correct |
31 ms |
632 KB |
Output is correct |
60 |
Correct |
29 ms |
504 KB |
Output is correct |
61 |
Correct |
16 ms |
436 KB |
Output is correct |
62 |
Correct |
8 ms |
476 KB |
Output is correct |
63 |
Correct |
17 ms |
424 KB |
Output is correct |
64 |
Correct |
13 ms |
384 KB |
Output is correct |
65 |
Correct |
15 ms |
504 KB |
Output is correct |
66 |
Correct |
7 ms |
452 KB |
Output is correct |
67 |
Correct |
16 ms |
352 KB |
Output is correct |
68 |
Correct |
13 ms |
376 KB |
Output is correct |
69 |
Correct |
18 ms |
380 KB |
Output is correct |
70 |
Correct |
16 ms |
376 KB |
Output is correct |
71 |
Partially correct |
50 ms |
724 KB |
Partially correct - number of queries: 5562 |
72 |
Correct |
18 ms |
516 KB |
Output is correct |
73 |
Partially correct |
61 ms |
724 KB |
Partially correct - number of queries: 5506 |
74 |
Partially correct |
49 ms |
708 KB |
Partially correct - number of queries: 5530 |
75 |
Correct |
19 ms |
504 KB |
Output is correct |
76 |
Correct |
53 ms |
704 KB |
Output is correct |
77 |
Partially correct |
26 ms |
912 KB |
Partially correct - number of queries: 5537 |
78 |
Correct |
9 ms |
512 KB |
Output is correct |
79 |
Correct |
33 ms |
604 KB |
Output is correct |
80 |
Partially correct |
66 ms |
784 KB |
Partially correct - number of queries: 5555 |
81 |
Partially correct |
62 ms |
760 KB |
Partially correct - number of queries: 5496 |
82 |
Partially correct |
32 ms |
856 KB |
Partially correct - number of queries: 5482 |
83 |
Correct |
18 ms |
376 KB |
Output is correct |
84 |
Correct |
44 ms |
700 KB |
Output is correct |
85 |
Partially correct |
36 ms |
852 KB |
Partially correct - number of queries: 5528 |
86 |
Correct |
9 ms |
520 KB |
Output is correct |
87 |
Correct |
10 ms |
392 KB |
Output is correct |
88 |
Correct |
17 ms |
384 KB |
Output is correct |
89 |
Correct |
15 ms |
424 KB |
Output is correct |
90 |
Correct |
12 ms |
440 KB |
Output is correct |
91 |
Correct |
9 ms |
404 KB |
Output is correct |
92 |
Correct |
18 ms |
552 KB |
Output is correct |
93 |
Correct |
22 ms |
500 KB |
Output is correct |
94 |
Correct |
15 ms |
448 KB |
Output is correct |
95 |
Correct |
14 ms |
376 KB |
Output is correct |
96 |
Correct |
18 ms |
504 KB |
Output is correct |
97 |
Correct |
14 ms |
376 KB |
Output is correct |