// #pragma GCC optimize("Ofast")
// #pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
#include <xylophone.h>
using namespace std;
#define int long long
#define pb push_back
// #define endl '\n'
#define fastIO ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);
#define setmin(x,y) x=min((x),(y))
#define setmax(x,y) x=max((x),(y))
#define fi first
#define se second
mt19937 hdp(chrono::high_resolution_clock::now().time_since_epoch().count());
int rand(int l,int r){return l+((hdp()%(r-l+1))+r-l+1)%(r-l+1);}
const int N = 1e4+5;
const int mod = 998244353;
const int SQ = 450;
const int inf = 1e9+1;
int ans[N],n;
bool b[N];
bool check(int x)
{
if(x<0||x>n) return 0;
return !b[x];
}
void solve(int _n)
{
n=_n;
int l=1,r=n-1;
while(l<r-1)
{
int m=l+r>>1;
if(query(1,m)!=n-1) r=m;
else l=m;
}
ans[l]=1; b[1]=1;
if(l-1)
{
ans[l-1]=ans[l]+query(l-1,l);
b[ans[l-1]]=1;
}
if(l+1<=n)
{
ans[l+1]=ans[l]+query(l,l+1);
b[ans[l+1]]=1;
}
for(int i=l-2;i>=1;i--)
{
int t=query(i,i+1);
if(!check(ans[i+1]+t)) ans[i]=ans[i+1]-t;
else if(!check(ans[i+1]-t)) ans[i]=ans[i+1]+t;
if(!ans[i])
{
int tt=query(i,i+2);
if(tt==abs(ans[i+2]-ans[i+1]))
{
if(ans[i+2]>ans[i+1]) ans[i]=ans[i+1]+t;
else ans[i]=ans[i+1]-t;
}
else if(tt==t)
{
if(ans[i+2]>ans[i+1]) ans[i]=ans[i+1]+t;
else ans[i]=ans[i+1]-t;
}
else
{
if(ans[i+2]>ans[i+1]) ans[i]=ans[i+1]-t;
else ans[i]=ans[i+1]+t;
}
}
b[ans[i]]=1;
}
for(int i=1;i<=n;i++) answer(i,ans[i]);
}
Compilation message
xylophone.cpp: In function 'void solve(long long int)':
xylophone.cpp:39:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
39 | int m=l+r>>1;
| ~^~
/usr/bin/ld: /tmp/ccb6RBhU.o: in function `main':
grader.cpp:(.text.startup+0x30): undefined reference to `solve(int)'
collect2: error: ld returned 1 exit status
