#include "prize.h"
#include <bits/stdc++.h>
#define MAX_N 200000
using namespace std;
int N;
bool mark[MAX_N];
vector<int> resp[MAX_N];
int worst=MAX_N;
vector<int> aksp(int x){
if(!mark[x]){
resp[x]=ask(x);
mark[x]=1;
}
return resp[x];
}
int left(int x){
if(!mark[x]){
resp[x]=ask(x);
mark[x]=1;
}
return resp[x][0];
}
int right(int x){
if(!mark[x]){
resp[x]=ask(x);
mark[x]=1;
}
return resp[x][1];
}
int weight(int x){//printf("weight(%d)\n", x);
return left(x)+right(x);
}
int find(int l, int r){
//printf("find(%d, %d)\n", l, r);
if(l>=r && l>=0 && l<N){
if(weight(l)==0){
return l;
}
return -1;
}
if(weight(l)==0)return l;
if(weight(r)==0)return r;
if(weight(l)!=weight(r)){
if(weight(l)>weight(r))return find(l, r-1);
else return find(l+1, r);
}
if(left(r)==left(l))return -1;
int mid=(l+r)/2;
int rl=-1, rr=-1;
if(weight(mid)==0)return mid;
rl=find(l, mid);
if(rl>-1)return rl;
else return find(mid+1, r);
}
int easy_solve(int n) {
for(int i = 0; i < n; i++) {
std::vector<int> res = ask(i);
if(res[0] + res[1] == 0)
return i;
}
return 0;
}
void find_worst(){
for(int i=0; i<450; ++i){//Ad hoc
if(left(i)+right(i)<worst){
worst=left(i)+right(i);
if(2*worst>N){
return;
}
}
}
}
int find_best(int n) {
N=n;
//if(N<5005)return easy_solve(N);
//find_worst();
return find(0, N-1);
}
Compilation message
prize.cpp: In function 'int find(int, int)':
prize.cpp:56:13: warning: unused variable 'rr' [-Wunused-variable]
int rl=-1, rr=-1;
^~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
6 ms |
4984 KB |
Output is correct |
| 2 |
Correct |
8 ms |
5176 KB |
Output is correct |
| 3 |
Correct |
6 ms |
5176 KB |
Output is correct |
| 4 |
Correct |
7 ms |
5176 KB |
Output is correct |
| 5 |
Correct |
7 ms |
5176 KB |
Output is correct |
| 6 |
Correct |
6 ms |
5176 KB |
Output is correct |
| 7 |
Correct |
6 ms |
5176 KB |
Output is correct |
| 8 |
Correct |
7 ms |
5260 KB |
Output is correct |
| 9 |
Correct |
7 ms |
5260 KB |
Output is correct |
| 10 |
Correct |
7 ms |
5260 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
6 ms |
5260 KB |
Output is correct |
| 2 |
Correct |
6 ms |
5260 KB |
Output is correct |
| 3 |
Correct |
7 ms |
5260 KB |
Output is correct |
| 4 |
Correct |
8 ms |
5260 KB |
Output is correct |
| 5 |
Correct |
6 ms |
5260 KB |
Output is correct |
| 6 |
Correct |
7 ms |
5260 KB |
Output is correct |
| 7 |
Correct |
6 ms |
5260 KB |
Output is correct |
| 8 |
Correct |
6 ms |
5260 KB |
Output is correct |
| 9 |
Correct |
6 ms |
5260 KB |
Output is correct |
| 10 |
Correct |
6 ms |
5260 KB |
Output is correct |
| 11 |
Correct |
14 ms |
5260 KB |
Output is correct |
| 12 |
Correct |
6 ms |
5264 KB |
Output is correct |
| 13 |
Correct |
12 ms |
5436 KB |
Output is correct |
| 14 |
Correct |
10 ms |
5436 KB |
Output is correct |
| 15 |
Correct |
16 ms |
5436 KB |
Output is correct |
| 16 |
Partially correct |
60 ms |
5688 KB |
Partially correct - number of queries: 6196 |
| 17 |
Correct |
6 ms |
5688 KB |
Output is correct |
| 18 |
Partially correct |
36 ms |
5688 KB |
Partially correct - number of queries: 7516 |
| 19 |
Correct |
6 ms |
5688 KB |
Output is correct |
| 20 |
Correct |
21 ms |
5688 KB |
Output is correct |
| 21 |
Correct |
45 ms |
5688 KB |
Output is correct |
| 22 |
Correct |
12 ms |
5688 KB |
Output is correct |
| 23 |
Correct |
6 ms |
5688 KB |
Output is correct |
| 24 |
Correct |
8 ms |
5688 KB |
Output is correct |
| 25 |
Correct |
63 ms |
5688 KB |
Output is correct |
| 26 |
Correct |
57 ms |
5688 KB |
Output is correct |
| 27 |
Correct |
10 ms |
5688 KB |
Output is correct |
| 28 |
Partially correct |
88 ms |
5688 KB |
Partially correct - number of queries: 6453 |
| 29 |
Correct |
45 ms |
5688 KB |
Output is correct |
| 30 |
Partially correct |
61 ms |
5764 KB |
Partially correct - number of queries: 7471 |
| 31 |
Correct |
9 ms |
5764 KB |
Output is correct |
| 32 |
Correct |
19 ms |
5764 KB |
Output is correct |
| 33 |
Correct |
7 ms |
5764 KB |
Output is correct |
| 34 |
Correct |
15 ms |
5764 KB |
Output is correct |
| 35 |
Correct |
8 ms |
5764 KB |
Output is correct |
| 36 |
Correct |
23 ms |
5764 KB |
Output is correct |
| 37 |
Correct |
11 ms |
5764 KB |
Output is correct |
| 38 |
Correct |
10 ms |
5764 KB |
Output is correct |
| 39 |
Correct |
40 ms |
5764 KB |
Output is correct |
| 40 |
Partially correct |
59 ms |
5764 KB |
Partially correct - number of queries: 6508 |
| 41 |
Correct |
54 ms |
5764 KB |
Output is correct |
| 42 |
Correct |
61 ms |
5764 KB |
Output is correct |
| 43 |
Correct |
36 ms |
5764 KB |
Output is correct |
| 44 |
Correct |
44 ms |
5764 KB |
Output is correct |
| 45 |
Correct |
37 ms |
5764 KB |
Output is correct |
| 46 |
Correct |
6 ms |
5764 KB |
Output is correct |
| 47 |
Correct |
42 ms |
5764 KB |
Output is correct |
| 48 |
Partially correct |
72 ms |
5764 KB |
Partially correct - number of queries: 5340 |
| 49 |
Correct |
18 ms |
5764 KB |
Output is correct |
| 50 |
Partially correct |
74 ms |
5764 KB |
Partially correct - number of queries: 7474 |
| 51 |
Correct |
40 ms |
5764 KB |
Output is correct |
| 52 |
Correct |
8 ms |
5764 KB |
Output is correct |
| 53 |
Correct |
8 ms |
5764 KB |
Output is correct |
| 54 |
Correct |
44 ms |
5764 KB |
Output is correct |
| 55 |
Correct |
7 ms |
5764 KB |
Output is correct |
| 56 |
Partially correct |
87 ms |
5764 KB |
Partially correct - number of queries: 7562 |
| 57 |
Partially correct |
70 ms |
5764 KB |
Partially correct - number of queries: 5315 |
| 58 |
Partially correct |
80 ms |
5764 KB |
Partially correct - number of queries: 5374 |
| 59 |
Correct |
23 ms |
5764 KB |
Output is correct |
| 60 |
Correct |
49 ms |
5764 KB |
Output is correct |
| 61 |
Correct |
8 ms |
5764 KB |
Output is correct |
| 62 |
Correct |
7 ms |
5764 KB |
Output is correct |
| 63 |
Correct |
12 ms |
5764 KB |
Output is correct |
| 64 |
Correct |
8 ms |
5764 KB |
Output is correct |
| 65 |
Correct |
6 ms |
5764 KB |
Output is correct |
| 66 |
Correct |
7 ms |
5764 KB |
Output is correct |
| 67 |
Correct |
11 ms |
5764 KB |
Output is correct |
| 68 |
Correct |
12 ms |
5764 KB |
Output is correct |
| 69 |
Correct |
8 ms |
5764 KB |
Output is correct |
| 70 |
Correct |
10 ms |
5764 KB |
Output is correct |
| 71 |
Partially correct |
89 ms |
5764 KB |
Partially correct - number of queries: 8104 |
| 72 |
Correct |
18 ms |
5764 KB |
Output is correct |
| 73 |
Partially correct |
85 ms |
5764 KB |
Partially correct - number of queries: 7999 |
| 74 |
Partially correct |
52 ms |
5764 KB |
Partially correct - number of queries: 8044 |
| 75 |
Correct |
8 ms |
5764 KB |
Output is correct |
| 76 |
Partially correct |
76 ms |
5764 KB |
Partially correct - number of queries: 7024 |
| 77 |
Partially correct |
78 ms |
5764 KB |
Partially correct - number of queries: 7264 |
| 78 |
Correct |
18 ms |
5764 KB |
Output is correct |
| 79 |
Correct |
52 ms |
5764 KB |
Output is correct |
| 80 |
Partially correct |
98 ms |
5764 KB |
Partially correct - number of queries: 7326 |
| 81 |
Partially correct |
42 ms |
5764 KB |
Partially correct - number of queries: 7196 |
| 82 |
Partially correct |
84 ms |
5764 KB |
Partially correct - number of queries: 7258 |
| 83 |
Correct |
8 ms |
5764 KB |
Output is correct |
| 84 |
Partially correct |
82 ms |
5764 KB |
Partially correct - number of queries: 6078 |
| 85 |
Partially correct |
53 ms |
5772 KB |
Partially correct - number of queries: 7270 |
| 86 |
Correct |
11 ms |
5772 KB |
Output is correct |
| 87 |
Correct |
9 ms |
5772 KB |
Output is correct |
| 88 |
Correct |
10 ms |
5772 KB |
Output is correct |
| 89 |
Correct |
9 ms |
5772 KB |
Output is correct |
| 90 |
Correct |
8 ms |
5772 KB |
Output is correct |
| 91 |
Correct |
10 ms |
5772 KB |
Output is correct |
| 92 |
Correct |
8 ms |
5772 KB |
Output is correct |
| 93 |
Correct |
11 ms |
5772 KB |
Output is correct |
| 94 |
Correct |
11 ms |
5772 KB |
Output is correct |
| 95 |
Correct |
11 ms |
5772 KB |
Output is correct |
| 96 |
Correct |
13 ms |
5772 KB |
Output is correct |
| 97 |
Correct |
8 ms |
5772 KB |
Output is correct |
