QOJ.ac
QOJ
| ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
|---|---|---|---|---|---|---|---|---|---|
| #417531 | #6394. Turn on the Light | LCJ | WA | 1ms | 3736kb | C++14 | 650b | 2024-05-22 19:34:29 | 2024-05-22 19:34:30 |
Judging History
answer
#include<bits/stdc++.h>
#define int long long
using namespace std;
const int N=1e5+10;
int n,m,k,q,ans;
int ask(int x){
cout<<"? "<<x<<endl;
cout.flush();
int res;
cin>>res;
return res;
}
void solve(){
cin>>n;
k=0;
int l=11,r=n;
for(int i=1;i<=10;i++){
int kk=ask(i);
if(k==kk){
cout<<"! "<<i<<endl;
return;
}
k=kk;
}
ans=10;
while(l<=r){
int mid=(l+r+1)/2;
ans=ask(mid);
if(ans==k){
cout<<"! "<<mid<<endl;
return;
}
if(k<ans){
k=ans;
l=mid+1;
}
else{
k=ans;
r=mid-1;
}
}
}
signed main(){
int T=1;
//cin>>T;
while(T--){
solve();
}
}
Details
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Test #1:
score: 100
Accepted
time: 1ms
memory: 3588kb
input:
3 1 2 2
output:
? 1 ? 2 ? 3 ! 3
result:
ok Correct position at 3
Test #2:
score: 0
Accepted
time: 1ms
memory: 3644kb
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: 1ms
memory: 3656kb
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: 3652kb
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: 1ms
memory: 3712kb
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: 1ms
memory: 3660kb
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: 0ms
memory: 3656kb
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: 3644kb
input:
4 1 2 3 3
output:
? 1 ? 2 ? 3 ? 4 ! 4
result:
ok Correct position at 4
Test #9:
score: 0
Accepted
time: 1ms
memory: 3708kb
input:
3 1 1
output:
? 1 ? 2 ! 2
result:
ok Correct position at 2
Test #10:
score: 0
Accepted
time: 0ms
memory: 3664kb
input:
2 1 1
output:
? 1 ? 2 ! 2
result:
ok Correct position at 2
Test #11:
score: 0
Accepted
time: 1ms
memory: 3736kb
input:
1 0
output:
? 1 ! 1
result:
ok Correct position at 1
Test #12:
score: -100
Wrong Answer
time: 1ms
memory: 3660kb
input:
1000000 1 2 3 4 5 6 7 8 9 10 9 8 9 8 7 8 7 6 5 4 3 2 1 0 1 2 3 4 5
output:
? 1 ? 2 ? 3 ? 4 ? 5 ? 6 ? 7 ? 8 ? 9 ? 10 ? 500006 ? 250008 ? 125009 ? 187509 ? 156259 ? 140634 ? 148447 ? 144541 ? 142588 ? 141611 ? 141123 ? 140879 ? 140757 ? 140696 ? 140665 ? 140681 ? 140689 ? 140693 ? 140695
result:
wrong answer format Unexpected end of file - token expected