#include "bits/stdc++.h"
using namespace std;
#define INF 1000000000
#define INFLL 1000000000000000000ll
#define EPS 1e-9
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define pb push_back
#define fi first
#define sc second
using i64 = long long;
using u64 = unsigned long long;
using ld = long double;
using ii = pair<int, int>;
int query(int p) {
int ans;
cout << "? " << p << endl;
cin >> ans;
return ans;
}
void answer(int p) {
cout << "= " << p << endl;
exit(0);
}
void solve() {
int n;
cin >> n;
int l = 1, r = n + 1;
while(l < r) {
int m = (l + r) / 2;
int ans = query(m);
if(ans > 0) r = m;
else if(ans < 0) l = m + 1;
else answer(m);
}
}
int main() {
ios_base :: sync_with_stdio(false);
//cin.tie(0);
int t = 1;
//cin >> t;
while(t--) solve();
return 0;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
308 KB |
Output is correct |
| 2 |
Correct |
0 ms |
208 KB |
Output is correct |
| 3 |
Correct |
0 ms |
208 KB |
Output is correct |
| 4 |
Correct |
0 ms |
208 KB |
Output is correct |
| 5 |
Correct |
0 ms |
208 KB |
Output is correct |
| 6 |
Correct |
1 ms |
256 KB |
Output is correct |
| 7 |
Correct |
0 ms |
208 KB |
Output is correct |
| 8 |
Correct |
0 ms |
208 KB |
Output is correct |
| 9 |
Correct |
1 ms |
208 KB |
Output is correct |
| 10 |
Correct |
0 ms |
208 KB |
Output is correct |
| 11 |
Correct |
0 ms |
208 KB |
Output is correct |
| 12 |
Correct |
0 ms |
208 KB |
Output is correct |
| 13 |
Correct |
1 ms |
208 KB |
Output is correct |
| 14 |
Correct |
0 ms |
208 KB |
Output is correct |
| 15 |
Correct |
1 ms |
208 KB |
Output is correct |
| 16 |
Correct |
0 ms |
208 KB |
Output is correct |
| 17 |
Correct |
0 ms |
208 KB |
Output is correct |
| 18 |
Correct |
0 ms |
208 KB |
Output is correct |
| 19 |
Correct |
0 ms |
208 KB |
Output is correct |
| 20 |
Correct |
0 ms |
208 KB |
Output is correct |
| 21 |
Correct |
0 ms |
208 KB |
Output is correct |
| 22 |
Correct |
1 ms |
312 KB |
Output is correct |
| 23 |
Correct |
0 ms |
308 KB |
Output is correct |
| 24 |
Correct |
1 ms |
208 KB |
Output is correct |
| 25 |
Correct |
1 ms |
208 KB |
Output is correct |
| 26 |
Correct |
1 ms |
208 KB |
Output is correct |
| 27 |
Correct |
0 ms |
312 KB |
Output is correct |
| 28 |
Correct |
0 ms |
228 KB |
Output is correct |
| 29 |
Correct |
1 ms |
208 KB |
Output is correct |
| 30 |
Correct |
0 ms |
208 KB |
Output is correct |
| 31 |
Correct |
0 ms |
208 KB |
Output is correct |
| 32 |
Correct |
1 ms |
208 KB |
Output is correct |
| 33 |
Correct |
0 ms |
208 KB |
Output is correct |
| 34 |
Correct |
0 ms |
208 KB |
Output is correct |
| 35 |
Correct |
0 ms |
208 KB |
Output is correct |
| 36 |
Correct |
0 ms |
208 KB |
Output is correct |
| 37 |
Correct |
0 ms |
208 KB |
Output is correct |
| 38 |
Correct |
1 ms |
208 KB |
Output is correct |
| 39 |
Correct |
1 ms |
208 KB |
Output is correct |
| 40 |
Correct |
1 ms |
316 KB |
Output is correct |
| 41 |
Correct |
1 ms |
312 KB |
Output is correct |
| 42 |
Correct |
0 ms |
208 KB |
Output is correct |
| 43 |
Correct |
1 ms |
328 KB |
Output is correct |
| 44 |
Correct |
0 ms |
208 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
308 KB |
Output is correct |
| 2 |
Correct |
0 ms |
208 KB |
Output is correct |
| 3 |
Correct |
0 ms |
208 KB |
Output is correct |
| 4 |
Correct |
0 ms |
208 KB |
Output is correct |
| 5 |
Correct |
0 ms |
208 KB |
Output is correct |
| 6 |
Correct |
1 ms |
256 KB |
Output is correct |
| 7 |
Correct |
0 ms |
208 KB |
Output is correct |
| 8 |
Correct |
0 ms |
208 KB |
Output is correct |
| 9 |
Correct |
1 ms |
208 KB |
Output is correct |
| 10 |
Correct |
0 ms |
208 KB |
Output is correct |
| 11 |
Correct |
0 ms |
208 KB |
Output is correct |
| 12 |
Correct |
0 ms |
208 KB |
Output is correct |
| 13 |
Correct |
1 ms |
208 KB |
Output is correct |
| 14 |
Correct |
0 ms |
208 KB |
Output is correct |
| 15 |
Correct |
1 ms |
208 KB |
Output is correct |
| 16 |
Correct |
0 ms |
208 KB |
Output is correct |
| 17 |
Correct |
0 ms |
208 KB |
Output is correct |
| 18 |
Correct |
0 ms |
208 KB |
Output is correct |
| 19 |
Correct |
0 ms |
208 KB |
Output is correct |
| 20 |
Correct |
0 ms |
208 KB |
Output is correct |
| 21 |
Correct |
0 ms |
208 KB |
Output is correct |
| 22 |
Correct |
1 ms |
312 KB |
Output is correct |
| 23 |
Correct |
0 ms |
308 KB |
Output is correct |
| 24 |
Correct |
1 ms |
208 KB |
Output is correct |
| 25 |
Correct |
1 ms |
208 KB |
Output is correct |
| 26 |
Correct |
1 ms |
208 KB |
Output is correct |
| 27 |
Correct |
0 ms |
312 KB |
Output is correct |
| 28 |
Correct |
0 ms |
228 KB |
Output is correct |
| 29 |
Correct |
1 ms |
208 KB |
Output is correct |
| 30 |
Correct |
0 ms |
208 KB |
Output is correct |
| 31 |
Correct |
0 ms |
208 KB |
Output is correct |
| 32 |
Correct |
1 ms |
208 KB |
Output is correct |
| 33 |
Correct |
0 ms |
208 KB |
Output is correct |
| 34 |
Correct |
0 ms |
208 KB |
Output is correct |
| 35 |
Correct |
0 ms |
208 KB |
Output is correct |
| 36 |
Correct |
0 ms |
208 KB |
Output is correct |
| 37 |
Correct |
0 ms |
208 KB |
Output is correct |
| 38 |
Correct |
1 ms |
208 KB |
Output is correct |
| 39 |
Correct |
1 ms |
208 KB |
Output is correct |
| 40 |
Correct |
1 ms |
316 KB |
Output is correct |
| 41 |
Correct |
1 ms |
312 KB |
Output is correct |
| 42 |
Correct |
0 ms |
208 KB |
Output is correct |
| 43 |
Correct |
1 ms |
328 KB |
Output is correct |
| 44 |
Correct |
0 ms |
208 KB |
Output is correct |
| 45 |
Correct |
1 ms |
208 KB |
Output is correct |
| 46 |
Correct |
1 ms |
208 KB |
Output is correct |
| 47 |
Correct |
1 ms |
208 KB |
Output is correct |
| 48 |
Correct |
1 ms |
208 KB |
Output is correct |
| 49 |
Correct |
1 ms |
208 KB |
Output is correct |
| 50 |
Correct |
0 ms |
208 KB |
Output is correct |
| 51 |
Correct |
0 ms |
208 KB |
Output is correct |
| 52 |
Correct |
1 ms |
208 KB |
Output is correct |
| 53 |
Correct |
0 ms |
208 KB |
Output is correct |
| 54 |
Correct |
1 ms |
208 KB |
Output is correct |
| 55 |
Correct |
1 ms |
208 KB |
Output is correct |
| 56 |
Correct |
0 ms |
208 KB |
Output is correct |
| 57 |
Correct |
1 ms |
208 KB |
Output is correct |
| 58 |
Correct |
0 ms |
208 KB |
Output is correct |
| 59 |
Correct |
0 ms |
208 KB |
Output is correct |
| 60 |
Correct |
0 ms |
208 KB |
Output is correct |
| 61 |
Correct |
1 ms |
208 KB |
Output is correct |
| 62 |
Correct |
0 ms |
208 KB |
Output is correct |
| 63 |
Correct |
1 ms |
208 KB |
Output is correct |
| 64 |
Correct |
0 ms |
208 KB |
Output is correct |
| 65 |
Correct |
1 ms |
208 KB |
Output is correct |
| 66 |
Correct |
1 ms |
208 KB |
Output is correct |
| 67 |
Correct |
1 ms |
208 KB |
Output is correct |
| 68 |
Correct |
1 ms |
208 KB |
Output is correct |
| 69 |
Correct |
1 ms |
208 KB |
Output is correct |
| 70 |
Correct |
1 ms |
208 KB |
Output is correct |
| 71 |
Correct |
1 ms |
208 KB |
Output is correct |
| 72 |
Correct |
1 ms |
208 KB |
Output is correct |
| 73 |
Correct |
1 ms |
208 KB |
Output is correct |
| 74 |
Correct |
1 ms |
248 KB |
Output is correct |
| 75 |
Correct |
1 ms |
208 KB |
Output is correct |
| 76 |
Correct |
1 ms |
208 KB |
Output is correct |
| 77 |
Correct |
1 ms |
208 KB |
Output is correct |
| 78 |
Correct |
1 ms |
208 KB |
Output is correct |
| 79 |
Correct |
1 ms |
208 KB |
Output is correct |
| 80 |
Correct |
1 ms |
208 KB |
Output is correct |
| 81 |
Correct |
1 ms |
208 KB |
Output is correct |
| 82 |
Correct |
0 ms |
312 KB |
Output is correct |
| 83 |
Correct |
1 ms |
208 KB |
Output is correct |
| 84 |
Correct |
1 ms |
208 KB |
Output is correct |
| 85 |
Correct |
1 ms |
208 KB |
Output is correct |
| 86 |
Correct |
0 ms |
208 KB |
Output is correct |
| 87 |
Correct |
1 ms |
208 KB |
Output is correct |
| 88 |
Correct |
1 ms |
208 KB |
Output is correct |
| 89 |
Correct |
1 ms |
208 KB |
Output is correct |
| 90 |
Correct |
1 ms |
208 KB |
Output is correct |
| 91 |
Correct |
1 ms |
208 KB |
Output is correct |
| 92 |
Correct |
1 ms |
208 KB |
Output is correct |
| 93 |
Correct |
0 ms |
312 KB |
Output is correct |
| 94 |
Correct |
1 ms |
208 KB |
Output is correct |
| 95 |
Correct |
1 ms |
208 KB |
Output is correct |
| 96 |
Correct |
1 ms |
208 KB |
Output is correct |
| 97 |
Correct |
1 ms |
208 KB |
Output is correct |
| 98 |
Correct |
1 ms |
312 KB |
Output is correct |
| 99 |
Correct |
3 ms |
208 KB |
Output is correct |
| 100 |
Correct |
1 ms |
208 KB |
Output is correct |
| 101 |
Correct |
1 ms |
208 KB |
Output is correct |
| 102 |
Correct |
1 ms |
208 KB |
Output is correct |
| 103 |
Correct |
1 ms |
208 KB |
Output is correct |
| 104 |
Correct |
1 ms |
208 KB |
Output is correct |
| 105 |
Correct |
1 ms |
208 KB |
Output is correct |
| 106 |
Correct |
1 ms |
208 KB |
Output is correct |
| 107 |
Correct |
1 ms |
208 KB |
Output is correct |
| 108 |
Correct |
1 ms |
208 KB |
Output is correct |
| 109 |
Correct |
1 ms |
208 KB |
Output is correct |
