#include "grader.h"
#include<bits/stdc++.h>
#define pb push_back
#define fi first
#define se second
#define mp make_pair
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef long double ld;
template <typename T> bool chkmin(T &x,T y){return x>y?x=y,1:0;}
template <typename T> bool chkmax(T &x,T y){return x<y?x=y,1:0;}
ll readint(){
ll x=0,f=1; char ch=getchar();
while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}
while(ch>='0'&&ch<='9'){x=x*10+ch-'0';ch=getchar();}
return x*f;
}
mt19937 mrand(time(0));
int n;
int p[105],ans[105];
/*int query(vector<int> v){
printf("? ");
for(int i=1;i<=n;i++) printf("%d ",v[i]);
printf("\n");
fflush(stdout);
int cnt=0;
for(int i=1;i<=n;i++) cnt+=(p[i]==v[i]);
return cnt;
}*/
int ask(){
vector<int> v;
for(int i=1;i<=n;i++) v.pb(ans[i]);
int ret=query(v);
if(ret==n) exit(0);
return ret;
}
void solve(int n){
::n=n;
for(int i=1;i<=n;i++) ans[i]=0;
function<void(vector<int>,vector<int>)> rec=[&](vector<int> ids,vector<int> num){
if(ids.empty()) return;
shuffle(num.begin(),num.end(),mrand);
int sz=(int)ids.size();
int mx=-1,bst=0;
for(int i=0;i<sz;i++){
for(int j=0;j<sz;j++) ans[ids[j]]=num[(i+j)%sz];
if(chkmax(mx,ask())) bst=i;
}
for(int i=0;i<sz;i++) ans[ids[i]]=num[(bst+i)%sz];
if(mx==n) return;
assert(sz>2);
vector<int> c(sz);
for(int i=1;i<sz;i++){
swap(ans[ids[0]],ans[ids[i]]);
c[i]=ask()-mx;
swap(ans[ids[0]],ans[ids[i]]);
}
bool ok=true;
for(int i=1;i<sz;i++) if(c[i]>=0) ok=false;
if(ok){
bool f=false;
for(int i=1;i<sz;i++) if(c[i]==-2) f=true;
if(!f){
swap(ans[ids[1]],ans[ids[2]]);
if(ask()-mx==-2) ok=false;
swap(ans[ids[1]],ans[ids[2]]);
}
}
vector<int> nids,nnum;
if(!ok) nids.pb(ids[0]),nnum.pb(ans[ids[0]]);
for(int i=1;i<sz;i++){
if(ok+c[i]>=0) nids.pb(ids[i]),nnum.pb(ans[ids[i]]);
}
rec(nids,nnum);
};
vector<int> vec;
for(int i=1;i<=n;i++) vec.pb(i);
rec(vec,vec);
return 0;
}
Compilation message
mouse.cpp: In function 'void solve(int)':
mouse.cpp:91:9: error: return-statement with a value, in function returning 'void' [-fpermissive]
91 | return 0;
| ^
