#include "xylophone.h"
#include <bits/stdc++.h>
#define int long long
#define pb push_back
#define f first
#define s second
#define MOD 1000000007
#define flush fflush(stdout)
#define all(x) (x).begin(),(x).end()
using namespace std;
int n,m,T,k;
void solve (int n) {
int ind1;
int l=1;
int r=n;
while (l<=r) {
int mid=(l+r)/2;
int x=query(mid,n);
if (x==n-1) {
ind1=mid;
l=mid+1;
}
else {
r=mid-1;
}
}
int indn;
l=ind1+1;
r=n;
while (l<=r) {
int mid=(l+r)/2;
int x=query(ind1,mid);
if (x==n-1) {
indn=mid;
r=mid-1;
}
else {
l=mid+1;
}
}
vector<bool> fix(n+1,0);
vector<int> arr(n+1,0);
answer(ind1,1);
answer(indn,n);
fix[1]=1;
arr[ind1]=1;
fix[n]=1;
arr[indn]=n;
for (int i=ind1-1; i>=1; i--) {
int x=query(i,i+1);
int val1=arr[i+1]-x;
int val2=arr[i+1]+x;
if (val1<1 || fix[val1]==1) {
arr[i]=val2;
fix[val2]=1;
answer(i,val2);
}
else if (val2>n || fix[val2]==1) {
arr[i]=val1;
fix[val1]=1;
answer(i,val1);
}
else {
int y=query(i,i+2);
int val;
int mx=max(val1,max(arr[i+1],arr[i+2]));
int mn=min(val1,min(arr[i+1],arr[i+2]));
if (mx-mn==y) {
val=val1;
}
else {
val=val2;
}
arr[i]=val;
fix[val]=1;
answer(i,val);
}
}
for (int i=indn-1; i>ind1; i--) {
int x=query(i,i+1);
int val1=arr[i+1]-x;
int val2=arr[i+1]+x;
if (val1<1 || fix[val1]==1) {
arr[i]=val2;
fix[val2]=1;
answer(i,val2);
}
else if (val2>n || fix[val2]==1) {
arr[i]=val1;
fix[val1]=1;
answer(i,val1);
}
else {
int y=query(i,i+2);
int val;
int mx=max(val1,max(arr[i+1],arr[i+2]));
int mn=min(val1,min(arr[i+1],arr[i+2]));
if (mx-mn==y) {
val=val1;
}
else {
val=val2;
}
arr[i]=val;
fix[val]=1;
answer(i,val);
}
}
for (int i=indn+1; i<=n; i++) {
int x=query(i-1,i);
int val1=arr[i-1]-x;
int val2=arr[i-1]+x;
if (val1<1 || fix[val1]==1) {
arr[i]=val2;
fix[val2]=1;
answer(i,val2);
}
else if (val2>n || fix[val2]==1) {
arr[i]=val1;
fix[val1]=1;
answer(i,val1);
}
else {
int y=query(i-2,i);
int val;
int mx=max(val1,max(arr[i-1],arr[i-2]));
int mn=min(val1,min(arr[i-1],arr[i-2]));
if (mx-mn==y) {
val=val1;
}
else {
val=val2;
}
arr[i]=val;
fix[val]=1;
answer(i,val);
}
}
}
Compilation message
xylophone.cpp: In function 'void solve(long long int)':
xylophone.cpp:30:3: warning: 'ind1' may be used uninitialized in this function [-Wmaybe-uninitialized]
30 | l=ind1+1;
| ~^~~~~~~
xylophone.cpp:139:11: warning: 'indn' may be used uninitialized in this function [-Wmaybe-uninitialized]
139 | for (int i=indn+1; i<=n; i++) {
| ^
/usr/bin/ld: /tmp/ccL2qtON.o: in function `main':
grader.cpp:(.text.startup+0x30): undefined reference to `solve(int)'
collect2: error: ld returned 1 exit status
