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QOJ
| 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 |
|---|---|---|---|---|---|---|---|---|---|
| #637471 | #8239. Mysterious Tree | wzxtsl | Compile Error | / | / | C++23 | 4.0kb | 2024-10-13 12:59:23 | 2024-10-13 12:59:25 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
#define fast ios::sync_with_stdio(false),cin.tie(0),cout.tie(0)
#define For(i,j,k) for (int i=(j);i<=(k);i++)
#define rof(i,j,k) for (int i=(j);i>=(k);i--)
#define ull unsigned long long
#define lowbit(x) ((x)&(-(x)))
#define PII pair<int,int>
#define int long long
#define endl "\n"
#define ls rt<<1
#define rs rt<<1|1
typedef long long ll;
const int mod = 998244353;
const double eps = 1e-9;
const int N=2e6+7;
int n,m;
void solve(){
cin>>n;
if(n%2==0){
int cnt=0,i,j,num;
for(int k=1;k<=n;k+=2){
cout<<"? "<<k<<" "<<k+1<<endl;
cout.flush();
cin>>num;
if(num==1) cnt++,i=k,j=k+1;
}
if(cnt!=1){
cout<<"! 1"<<endl;
return ;
}
int a[3];
int cn=0;
for(int k=1;k<=n;k++){
if(k!=i&&k!=j){
a[++cn]=k;
}
}
cout<<"? "<<a[1]<<" "<<i<<endl;
cout.flush();
cin>>num;
if(num==1){
cout<<"? "<<a[2]<<" "<<i<<endl;
cout.flush();
cin>>num;
if(num==1){
cout<<"! 2"<<endl;
return ;
}else{
cout<<"! 1"<<endl;
}
}else{
cout<<"? "<<a[1]<<" "<<j<<endl;
cout.flush();
cin>>num;
if(num==1){
cout<<"? "<<a[2]<<" "<<j<<endl;
cout.flush();
cin>>num;
if(num==1){
cout<<"! 2"<<endl;
return ;
}else{
cout<<"! 1"<<endl;
return ;
}
}else{
cout<<"! 1"<<endl;
return ;
}
}
}else{
int cnt=0,i,j,num;
for(int k=1;k<=n&&k+1<=n;k+=2){
cout<<"? "<<k<<" "<<k+1<<endl;
cout.flush();
cin>>num;
if(num==1) cnt++,i=k,j=k+1;
}
if(cnt==0){
cout<<"? "<<n<<" "<<1<<endl;
cout.flush();
cin>>num;
if(num==1) cnt++;
cout<<"? "<<n<<" "<<2<<endl;
cout.flush();
cin>>num;
if(num==1) cnt++;
cout<<"? "<<n<<" "<<3<<endl;
cout.flush();
cin>>num;
if(num==1) cnt++;
if(cnt==3){
cout<<"! 2"<<endl;
return ;
}else{
cout<<"! 1"<<endl;
return ;
}
}else if(cnt==1){
for(int k=1;k<=n;k++){
if(k!=i&&k!=j){
a[++cn]=k;
}
}
cout<<"? "<<a[1]<<" "<<i<<endl;
cout.flush();
cin>>num;
if(num==1){
cout<<"? "<<a[2]<<" "<<i<<endl;
cout.flush();
cin>>num;
if(num==1){
cout<<"! 2"<<endl;
return ;
}else{
cout<<"! 1"<<endl;
}
}else{
cout<<"? "<<a[1]<<" "<<j<<endl;
cout.flush();
cin>>num;
if(num==1){
cout<<"? "<<a[2]<<" "<<j<<endl;
cout.flush();
cin>>num;
if(num==1){
cout<<"! 2"<<endl;
return ;
}else{
cout<<"! 1"<<endl;
return ;
}
}else{
cout<<"! 1"<<endl;
return ;
}
}
}else{
cout<<"! 1"<<endl;
return ;
}
}
}
signed main(){
int t=1;
cin>>t;
while(t--){
solve();
}
}
詳細信息
answer.code: In function ‘void solve()’:
answer.code:103:17: error: ‘a’ was not declared in this scope
103 | a[++cn]=k;
| ^
answer.code:103:21: error: ‘cn’ was not declared in this scope; did you mean ‘cnt’?
103 | a[++cn]=k;
| ^~
| cnt
answer.code:106:25: error: ‘a’ was not declared in this scope
106 | cout<<"? "<<a[1]<<" "<<i<<endl;
| ^