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ID	题目	提交者	结果	用时	内存	语言	文件大小	提交时间	测评时间
#378779	#6394. Turn on the Light	Aprilend^#	AC ✓	1ms	3728kb	C++14	1.5kb	2024-04-06 14:37:08	2024-04-06 14:37:08

Judging History

你现在查看的是最新测评结果

[2024-04-06 14:37:08]
评测

测评结果：AC
用时：1ms
内存：3728kb

查看

[2024-04-06 14:37:08]
提交

answer

#include<bits/stdc++.h>
using namespace std;
#define edl '\n'
#define re return
#define gcd __gcd
#define db double
#define fir first
#define sec second
#define MAX 1000006
#define ll long long
#define i64 __int128
#define inf 2147483647
#define MAXN 100000009 
#define pll pair<ll,ll>
#define pb push_back
#define vint vector<int>
#define pii pair<int,int>
#define ANS cout<<ans<<edl
#define No cout<<"No"<<edl
#define NO cout<<"NO"<<edl
#define hhh cout<<"hhh"<<edl
#define Yes cout<<"Yes"<<edl
#define YES cout<<"YES"<<edl
#define all(a,l,r) a+l,a+1+r
#define ull unsigned long long
#define INF 9223372036854775807
#define vpii vector<pair<int,int>>
#define sp(x) fixed << setprecision(x)
#define FOR(i,l,r) for(auto(i)=(l);(i)<=(r);++(i))
const ll mod = 1000000007;
ll qpow(ll n,ll m,ll mod)
{
	ll ans=1;if(n>mod) n%=mod;
	while(m>0){if(m&1) {ans*=n;ans%=mod;}
	n*=n; n%=mod; m>>=1;} return ans;
}

void Solve(void)
{
	int n; cin>>n;
	int l=1, r=n, mid=l+r>>1, ans, pre=0;
	FOR(i,1,20) {
		cout<<"? "<<i<<endl;
		cin>>ans;
		if(ans==pre) {
			cout<<"! "<<i<<endl;
			re;
		}
		pre=ans;
	}
	l=21;
	while(l <= r) {
        ll mid = l + r >> 1;
		cout<<"? "<<mid<<endl;
		cin>>ans;
		if(ans==pre) {
			cout<<"! "<<mid<<endl;
			re;
		}
		else if(ans>pre) {
			l=mid+1;
		}
		else if(ans<mid) {
			r=mid-1;
		}
		pre=ans;
    }
}
int main(void)
{
	std::ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
	int _=1;
	// cin>>_;
	while(_--)
    Solve ();
    return 0;
}

源文件, 语言: C++14

詳細信息

Test #1:

score: 100

Accepted

time: 0ms

memory: 3664kb

input:

output:

? 1
? 2
? 3
! 3

result:

ok Correct position at 3

Test #2:

score: 0

Accepted

time: 1ms

memory: 3588kb

input:

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: 3580kb

input:

output:

? 1
? 2
? 3
? 4
? 5
? 6
? 7
? 8
! 8

result:

ok Correct position at 8

Test #4:

score: 0

Accepted

time: 0ms

memory: 3668kb

input:

output:

? 1
? 2
? 3
? 4
? 5
? 6
? 7
! 7

result:

ok Correct position at 7

Test #5:

score: 0

Accepted

time: 0ms

memory: 3644kb

input:

output:

? 1
? 2
? 3
? 4
? 5
? 6
! 6

result:

ok Correct position at 6

Test #6:

score: 0

Accepted

time: 0ms

memory: 3588kb

input:

output:

? 1
? 2
? 3
? 4
? 5
? 6
! 6

result:

ok Correct position at 6

Test #7:

score: 0

Accepted

time: 0ms

memory: 3672kb

input:

output:

? 1
? 2
? 3
? 4
! 4

result:

ok Correct position at 4

Test #8:

score: 0

Accepted

time: 0ms

memory: 3668kb

input:

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: 3668kb

input:

2
1
1

output:

? 1
? 2
! 2

result:

ok Correct position at 2

Test #11:

score: 0

Accepted

time: 1ms

memory: 3652kb

input:

1
0

output:

? 1
! 1

result:

ok Correct position at 1

Test #12:

score: 0

Accepted

time: 0ms

memory: 3664kb

input:

output:

result:

ok Correct position at 937462

Test #13:

score: 0

Accepted

time: 1ms

memory: 3636kb

input:

output:

result:

ok Correct position at 187476

Test #14:

score: 0

Accepted

time: 1ms

memory: 3584kb

input:

output:

result:

ok Correct position at 687465

Test #15:

score: 0

Accepted

time: 1ms

memory: 3592kb

input:

output:

result:

ok Correct position at 437470

Test #16:

score: 0

Accepted

time: 1ms

memory: 3712kb

input:

output:

result:

ok Correct position at 937458

Test #17:

score: 0

Accepted

time: 1ms

memory: 3592kb

input:

output:

result:

ok Correct position at 249974

Test #18:

score: 0

Accepted

time: 0ms

memory: 3712kb

input:

output:

result:

ok Correct position at 749961

Test #19:

score: 0

Accepted

time: 0ms

memory: 3652kb

input:

output:

result:

ok Correct position at 499967

Test #20:

score: 0

Accepted

time: 1ms

memory: 3576kb

input:

output:

result:

ok Correct position at 999953

Test #21:

score: 0

Accepted

time: 1ms

memory: 3596kb

input:

output:

result:

ok Correct position at 249973

Test #22:

score: 0

Accepted

time: 1ms

memory: 3708kb

input:

output:

result:

ok Correct position at 43

Test #23:

score: 0

Accepted

time: 1ms

memory: 3624kb

input:

output:

result:

ok Correct position at 51

Test #24:

score: 0

Accepted

time: 1ms

memory: 3720kb

input:

output:

result:

ok Correct position at 51

Test #25:

score: 0

Accepted

time: 1ms

memory: 3584kb

input:

output:

result:

ok Correct position at 51

Test #26:

score: 0

Accepted

time: 0ms

memory: 3584kb

input:

output:

result:

ok Correct position at 999781

Test #27:

score: 0

Accepted

time: 1ms

memory: 3620kb

input:

output:

result:

ok Correct position at 999980

Test #28:

score: 0

Accepted

time: 1ms

memory: 3580kb

input:

output:

result:

ok Correct position at 999979

Test #29:

score: 0

Accepted

time: 1ms

memory: 3648kb

input:

output:

result:

ok Correct position at 999978

Test #30:

score: 0

Accepted

time: 1ms

memory: 3644kb

input:

output:

result:

ok Correct position at 499947

Test #31:

score: 0

Accepted

time: 1ms

memory: 3584kb

input:

output:

result:

ok Correct position at 500070

Test #32:

score: 0

Accepted

time: 0ms

memory: 3600kb

input:

output:

result:

ok Correct position at 500076

Test #33:

score: 0

Accepted

time: 1ms

memory: 3596kb

input:

output:

result:

ok Correct position at 499965

Test #34:

score: 0

Accepted

time: 1ms

memory: 3584kb

input:

output:

result:

ok Correct position at 795856

Test #35:

score: 0

Accepted

time: 1ms

memory: 3708kb

input:

output:

result:

ok Correct position at 170868

Test #36:

score: 0

Accepted

time: 1ms

memory: 3704kb

input:

output:

result:

ok Correct position at 670857

Test #37:

score: 0

Accepted

time: 1ms

memory: 3668kb

input:

output:

result:

ok Correct position at 420862

Test #38:

score: 0

Accepted

time: 1ms

memory: 3652kb

input:

output:

result:

ok Correct position at 1000000

Test #39:

score: 0

Accepted

time: 1ms

memory: 3708kb

input:

output:

result:

ok Correct position at 999999

Test #40:

score: 0

Accepted

time: 1ms

memory: 3580kb

input:

output:

result:

ok Correct position at 999998

Test #41:

score: 0

Accepted

time: 0ms

memory: 3728kb

input:

output:

result:

ok Correct position at 999997

Test #42:

score: 0

Accepted

time: 1ms

memory: 3652kb

input:

output:

result:

ok Correct position at 1000000

Test #43:

score: 0

Accepted

time: 0ms

memory: 3648kb

input:

1000000
0

output:

? 1
! 1

result:

ok Correct position at 1