#include "prize.h"
#include <bits/stdc++.h>
using namespace std;
int l[200005],r[200005],x[200005],answer=-1;
void solve(int L,int R){
if(answer!=-1) return;
if(L+1==R){
return;
}
int m=(L+R)>>1;
vector<int>res=ask(m);
l[m]=res[0];
r[m]=res[1];
if(l[m]+r[m]==0){
answer=m;
return;
}
if(l[m]!=l[L] || r[m]!=r[L]){
solve(L,m);
}
if(answer!=-1) return;
if(l[m]!=l[R] || r[m]!=r[R]){
solve(m,R);
}
}
int find_best(int n){
// for(int i = 0; i < n; i++){
// std::vector<int> res = ask(i);
// if(res[0] + res[1] == 0)
// return i;
// }
for(int i=0;i<n;i++){
l[i]=r[i]=-1;
}
int m=(n-1)/2;
vector<int>res=ask(0);
l[0]=res[0];
r[0]=res[1];
if(l[0]+r[0]==0) return 0;
res=ask(n-1);
l[n-1]=res[0];
r[n-1]=res[1];
if(l[n-1]+r[n-1]==0) return n-1;
solve(0,n-1);
return answer;
}
Compilation message
prize.cpp: In function 'int find_best(int)':
prize.cpp:35:6: warning: unused variable 'm' [-Wunused-variable]
35 | int m=(n-1)/2;
| ^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
1736 KB |
Output is correct |
| 2 |
Correct |
3 ms |
1828 KB |
Output is correct |
| 3 |
Correct |
2 ms |
1824 KB |
Output is correct |
| 4 |
Correct |
2 ms |
1864 KB |
Output is correct |
| 5 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 6 |
Correct |
2 ms |
1820 KB |
Output is correct |
| 7 |
Correct |
2 ms |
1760 KB |
Output is correct |
| 8 |
Correct |
2 ms |
1736 KB |
Output is correct |
| 9 |
Correct |
2 ms |
1808 KB |
Output is correct |
| 10 |
Correct |
3 ms |
1736 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
2 ms |
1832 KB |
Output is correct |
| 2 |
Correct |
3 ms |
1824 KB |
Output is correct |
| 3 |
Correct |
2 ms |
1864 KB |
Output is correct |
| 4 |
Correct |
2 ms |
1824 KB |
Output is correct |
| 5 |
Correct |
2 ms |
1864 KB |
Output is correct |
| 6 |
Correct |
2 ms |
1864 KB |
Output is correct |
| 7 |
Correct |
2 ms |
1820 KB |
Output is correct |
| 8 |
Correct |
2 ms |
1736 KB |
Output is correct |
| 9 |
Correct |
2 ms |
1736 KB |
Output is correct |
| 10 |
Correct |
2 ms |
1864 KB |
Output is correct |
| 11 |
Correct |
5 ms |
1828 KB |
Output is correct |
| 12 |
Correct |
2 ms |
1816 KB |
Output is correct |
| 13 |
Correct |
10 ms |
1864 KB |
Output is correct |
| 14 |
Correct |
2 ms |
456 KB |
Output is correct |
| 15 |
Correct |
7 ms |
1864 KB |
Output is correct |
| 16 |
Correct |
67 ms |
1824 KB |
Output is correct |
| 17 |
Correct |
2 ms |
1828 KB |
Output is correct |
| 18 |
Partially correct |
37 ms |
1728 KB |
Partially correct - number of queries: 5068 |
| 19 |
Correct |
2 ms |
1736 KB |
Output is correct |
| 20 |
Correct |
25 ms |
968 KB |
Output is correct |
| 21 |
Correct |
26 ms |
1736 KB |
Output is correct |
| 22 |
Correct |
4 ms |
1864 KB |
Output is correct |
| 23 |
Correct |
2 ms |
1820 KB |
Output is correct |
| 24 |
Correct |
2 ms |
1820 KB |
Output is correct |
| 25 |
Correct |
24 ms |
1824 KB |
Output is correct |
| 26 |
Correct |
13 ms |
1824 KB |
Output is correct |
| 27 |
Correct |
3 ms |
1816 KB |
Output is correct |
| 28 |
Correct |
71 ms |
1820 KB |
Output is correct |
| 29 |
Correct |
50 ms |
1736 KB |
Output is correct |
| 30 |
Partially correct |
85 ms |
1816 KB |
Partially correct - number of queries: 5022 |
| 31 |
Correct |
3 ms |
1816 KB |
Output is correct |
| 32 |
Correct |
5 ms |
1864 KB |
Output is correct |
| 33 |
Correct |
1 ms |
200 KB |
Output is correct |
| 34 |
Correct |
31 ms |
1824 KB |
Output is correct |
| 35 |
Correct |
3 ms |
1828 KB |
Output is correct |
| 36 |
Correct |
11 ms |
1728 KB |
Output is correct |
| 37 |
Correct |
2 ms |
1820 KB |
Output is correct |
| 38 |
Correct |
2 ms |
1736 KB |
Output is correct |
| 39 |
Correct |
13 ms |
1824 KB |
Output is correct |
| 40 |
Correct |
41 ms |
1824 KB |
Output is correct |
| 41 |
Correct |
15 ms |
1856 KB |
Output is correct |
| 42 |
Correct |
16 ms |
1864 KB |
Output is correct |
| 43 |
Correct |
37 ms |
1728 KB |
Output is correct |
| 44 |
Correct |
26 ms |
1728 KB |
Output is correct |
| 45 |
Correct |
24 ms |
1820 KB |
Output is correct |
| 46 |
Correct |
2 ms |
1820 KB |
Output is correct |
| 47 |
Correct |
20 ms |
1820 KB |
Output is correct |
| 48 |
Correct |
50 ms |
1864 KB |
Output is correct |
| 49 |
Correct |
7 ms |
1864 KB |
Output is correct |
| 50 |
Partially correct |
26 ms |
1820 KB |
Partially correct - number of queries: 5070 |
| 51 |
Correct |
13 ms |
1820 KB |
Output is correct |
| 52 |
Correct |
3 ms |
1728 KB |
Output is correct |
| 53 |
Correct |
3 ms |
1804 KB |
Output is correct |
| 54 |
Correct |
33 ms |
1736 KB |
Output is correct |
| 55 |
Correct |
2 ms |
1752 KB |
Output is correct |
| 56 |
Partially correct |
70 ms |
1736 KB |
Partially correct - number of queries: 5069 |
| 57 |
Correct |
32 ms |
1820 KB |
Output is correct |
| 58 |
Correct |
54 ms |
1816 KB |
Output is correct |
| 59 |
Correct |
42 ms |
1728 KB |
Output is correct |
| 60 |
Correct |
43 ms |
1820 KB |
Output is correct |
| 61 |
Correct |
5 ms |
1992 KB |
Output is correct |
| 62 |
Correct |
3 ms |
1828 KB |
Output is correct |
| 63 |
Correct |
4 ms |
1808 KB |
Output is correct |
| 64 |
Correct |
3 ms |
1828 KB |
Output is correct |
| 65 |
Correct |
3 ms |
1816 KB |
Output is correct |
| 66 |
Correct |
3 ms |
1736 KB |
Output is correct |
| 67 |
Correct |
2 ms |
1736 KB |
Output is correct |
| 68 |
Correct |
2 ms |
1820 KB |
Output is correct |
| 69 |
Correct |
3 ms |
1864 KB |
Output is correct |
| 70 |
Correct |
2 ms |
1728 KB |
Output is correct |
| 71 |
Correct |
74 ms |
1864 KB |
Output is correct |
| 72 |
Correct |
4 ms |
1864 KB |
Output is correct |
| 73 |
Correct |
75 ms |
1736 KB |
Output is correct |
| 74 |
Correct |
64 ms |
1864 KB |
Output is correct |
| 75 |
Correct |
4 ms |
1864 KB |
Output is correct |
| 76 |
Correct |
28 ms |
1736 KB |
Output is correct |
| 77 |
Partially correct |
26 ms |
1864 KB |
Partially correct - number of queries: 5216 |
| 78 |
Correct |
8 ms |
1864 KB |
Output is correct |
| 79 |
Correct |
37 ms |
1824 KB |
Output is correct |
| 80 |
Partially correct |
77 ms |
1736 KB |
Partially correct - number of queries: 5237 |
| 81 |
Partially correct |
78 ms |
1736 KB |
Partially correct - number of queries: 5218 |
| 82 |
Partially correct |
80 ms |
1864 KB |
Partially correct - number of queries: 5216 |
| 83 |
Correct |
4 ms |
1828 KB |
Output is correct |
| 84 |
Correct |
21 ms |
1864 KB |
Output is correct |
| 85 |
Partially correct |
61 ms |
1828 KB |
Partially correct - number of queries: 5233 |
| 86 |
Correct |
16 ms |
1736 KB |
Output is correct |
| 87 |
Correct |
6 ms |
1864 KB |
Output is correct |
| 88 |
Correct |
10 ms |
1764 KB |
Output is correct |
| 89 |
Correct |
13 ms |
1864 KB |
Output is correct |
| 90 |
Correct |
4 ms |
1736 KB |
Output is correct |
| 91 |
Correct |
9 ms |
1864 KB |
Output is correct |
| 92 |
Correct |
2 ms |
1864 KB |
Output is correct |
| 93 |
Correct |
6 ms |
1736 KB |
Output is correct |
| 94 |
Correct |
5 ms |
1864 KB |
Output is correct |
| 95 |
Correct |
4 ms |
1864 KB |
Output is correct |
| 96 |
Correct |
8 ms |
1864 KB |
Output is correct |
| 97 |
Correct |
2 ms |
1864 KB |
Output is correct |
