#include "xylophone.h"
#include<bits/stdc++.h>
using namespace std;
#define int long long
void solve(int n) {
if(n==1){
answer(1,1);
}
else if(n==2){
answer(1,1);
answer(1,2);
}
else{
int diff2[n+1];
int diff1[n+1];
for(int i=3;i<=n;i++){
diff1[i]=query(i-1,i);
diff2[i]=query(i-2,i);
}
int a[n+1];
int dist=query(1,2);
for(int m=-1;m<=1;m+=2){
a[1]=1e9;
a[2]=a[1]+m*dist;
int Min=min(a[1],a[2]);
for(int i=3;i<=n;i++){
if(diff2[i]==diff1[i]+abs(a[i-2]-a[i-1])){
if(a[i-2]>a[i-1]){
a[i]=a[i-1]-diff1[i];
}
else{
a[i]=a[i-1]+diff1[i];
}
}
else{
if(a[i-2]>a[i-1]){
a[i]=a[i-1]+diff1[i];
}
else{
a[i]=a[i-1]-diff1[i];
}
}
Min=min(a[1],a[i]);
}
Min--;
bool mark[n+1]={false};
bool flag=true;
for(int i=1;i<=n;i++){
a[i]-=Min;
if(a[i]>n||a[i]<=1||mark[a[i]]){
flag=false;
break;
}
mark[a[i]]=true;
}
if(flag){
for(int i=1;i<=n;i++){
answer(i,a[i]);
}
}
}
}
}
Compilation message
/usr/bin/ld: /tmp/ccjm10fa.o: in function `main':
grader.cpp:(.text.startup+0x30): undefined reference to `solve(int)'
collect2: error: ld returned 1 exit status
