QOJ.ac
QOJ
| ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
|---|---|---|---|---|---|---|---|---|---|
| #387319 | #6394. Turn on the Light | Dog_E# | WA | 1ms | 3728kb | C++20 | 890b | 2024-04-12 13:21:49 | 2024-04-12 13:21:50 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
int n;
int ask(int x) {
cout << "? " << x << endl;
int res;
cin >> res;
return res;
}
void print(int x) {
cout << "! " << x << endl;
return;
}
int main() {
ios::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
cin >> n;
int l = 1, r = n;
int last = 0, now = 0;
for (int i = 1; i <= 20; i++) {
last = now;
now = ask(i);
if (now == last) {
print(i);
return 0;
}
}
l = 21;
while (l < r) {
int mid = l + r >> 1;
last = now;
now = ask(mid);
if (now == last) {
print(mid);
return 0;
}
if (now > last)
l = mid + 1;
else
r = mid - 1;
}
cout << l << '\n';
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 3664kb
input:
3 1 2 2
output:
? 1 ? 2 ? 3 ! 3
result:
ok Correct position at 3
Test #2:
score: 0
Accepted
time: 0ms
memory: 3652kb
input:
10 1 2 3 4 5 6 7 8 8
output:
? 1 ? 2 ? 3 ? 4 ? 5 ? 6 ? 7 ? 8 ? 9 ! 9
result:
ok Correct position at 9
Test #3:
score: 0
Accepted
time: 0ms
memory: 3668kb
input:
9 1 2 3 4 5 6 7 7
output:
? 1 ? 2 ? 3 ? 4 ? 5 ? 6 ? 7 ? 8 ! 8
result:
ok Correct position at 8
Test #4:
score: 0
Accepted
time: 1ms
memory: 3680kb
input:
8 1 2 3 4 5 6 6
output:
? 1 ? 2 ? 3 ? 4 ? 5 ? 6 ? 7 ! 7
result:
ok Correct position at 7
Test #5:
score: 0
Accepted
time: 0ms
memory: 3652kb
input:
7 1 2 3 4 5 5
output:
? 1 ? 2 ? 3 ? 4 ? 5 ? 6 ! 6
result:
ok Correct position at 6
Test #6:
score: 0
Accepted
time: 0ms
memory: 3588kb
input:
6 1 2 3 4 5 5
output:
? 1 ? 2 ? 3 ? 4 ? 5 ? 6 ! 6
result:
ok Correct position at 6
Test #7:
score: 0
Accepted
time: 1ms
memory: 3728kb
input:
5 1 2 3 3
output:
? 1 ? 2 ? 3 ? 4 ! 4
result:
ok Correct position at 4
Test #8:
score: 0
Accepted
time: 0ms
memory: 3672kb
input:
4 1 2 3 3
output:
? 1 ? 2 ? 3 ? 4 ! 4
result:
ok Correct position at 4
Test #9:
score: 0
Accepted
time: 0ms
memory: 3708kb
input:
3 1 1
output:
? 1 ? 2 ! 2
result:
ok Correct position at 2
Test #10:
score: 0
Accepted
time: 1ms
memory: 3592kb
input:
2 1 1
output:
? 1 ? 2 ! 2
result:
ok Correct position at 2
Test #11:
score: 0
Accepted
time: 0ms
memory: 3564kb
input:
1 0
output:
? 1 ! 1
result:
ok Correct position at 1
Test #12:
score: -100
Wrong Answer
time: 1ms
memory: 3588kb
input:
1000000 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 22 23 24 25 26 27 28 29 30 31 32 31 32 31 32 33
output:
? 1 ? 2 ? 3 ? 4 ? 5 ? 6 ? 7 ? 8 ? 9 ? 10 ? 11 ? 12 ? 13 ? 14 ? 15 ? 16 ? 17 ? 18 ? 19 ? 20 ? 500010 ? 750005 ? 875003 ? 937502 ? 906252 ? 921877 ? 929689 ? 933595 ? 935548 ? 936525 ? 937013 ? 937257 ? 937379 ? 937440 ? 937471 ? 937455 ? 937463 ? 937459 ? 937461 937462
result:
wrong answer Token parameter [name=type] equals to "937462", doesn't correspond to pattern "?|!"