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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 |
---|---|---|---|---|---|---|---|---|---|
#230864 | #6394. Turn on the Light | LLCS# | WA | 1ms | 3824kb | C++14 | 1.5kb | 2023-10-28 21:23:04 | 2023-10-28 21:23:04 |
Judging History
answer
/*
@Date : 2023-10-28 21:18:55
@Author : Adscn ([email protected])
@Link : http://www.cnblogs.com/LLCSBlog
*/
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
#define IL inline
#define RG register
#define gi geti<int>()
#define gl geti<ll>()
#define gc getchar()
#define File(a) freopen(a".in","r",stdin);freopen(a".out","w",stdout)
template<typename T>IL bool chkmax(T &x,const T &y){return x<y?x=y,1:0;}
template<typename T>IL bool chkmin(T &x,const T &y){return x>y?x=y,1:0;}
template<typename T>
IL T geti()
{
RG T xi=0;
RG char ch=gc;
bool f=0;
while(!isdigit(ch))ch=='-'?f=1:f,ch=gc;
while(isdigit(ch))xi=xi*10+ch-48,ch=gc;
return f?-xi:xi;
}
template<typename T>
IL void pi(T k,char ch=0)
{
if(k<0)k=-k,putchar('-');
if(k>=10)pi(k/10);
putchar(k%10+'0');
if(ch)putchar(ch);
}
/*
IL unsigned int LOG2(unsigned int x)
{
unsigned int ret;
__asm__ __volatile__ ("bsrl %1, %%eax":"=a"(ret):"m"(x));
return ret;
}
*/
int query(int x){
printf("? %d\n",x);
fflush(stdout);
return gi;
}
void answer(int x){
printf("! %d\n",x);
fflush(stdout);
exit(0);
}
int main(void)
{
#ifndef ONLINE_JUDGE
// File("");
#endif
int n=gi;
int res=query(1);
if(!res)answer(1);
int l=2,r=n;
while(l<=r){
int mid=(l+r)/2;
int res1=query(mid);
if(res1==res)answer(mid);
if(res1<res)r=mid-1;
else l=mid+1;
res=res1;
}
return 0;
}
詳細信息
Test #1:
score: 100
Accepted
time: 1ms
memory: 3824kb
input:
3 1 2 2
output:
? 1 ? 2 ? 3 ! 3
result:
ok Correct position at 3
Test #2:
score: -100
Wrong Answer
time: 0ms
memory: 3808kb
input:
10 1 0 1 2 3
output:
? 1 ? 6 ? 3 ? 4 ? 5
result:
wrong answer format Unexpected end of file - token expected