Submission #1348569

#	Time	Username	Problem	Language	Result	Execution time	Memory
1348569		dugersuren	Xylophone (JOI18_xylophone)	C++20	Compilation error	0 ms	0 KiB

xylophone

#include "xylophone.h"
#include <bits/stdc++.h>
using namespace std;

void solve(int N) {
	int A[N+1], B[N+1];	
	A[1] = B[1] = 500069;
	int l=1,r=N-1;
	while(l+1<r){
		int m=(l+r)/2;		
		if(query(m,N)==N-1)l=m
		else r=m;
	}	
	if(l>1){
		ans[l]=1;
		ans[l-1]=query(l-1,l);
		for(int i=l-2;i>0;i--){
			int ix=query(i,i+1);
			int iy=query(i,i+2);
			if(ix==iy){
				if(ans[i+1]<ans[i+2])ans[i]=ans[i+2]-iy;
				else ans[i]=ans[i+2]+iy;
			}else{
				if(ans[i+1]<ans[i+2])ans[i]=ans[i+1]+ix;
				else ans[i]=ans[i+1]-ix;
			}
		}		
	}
	if(l<N){
		ans[l]=1;
		ans[l+1]=query(l,l+1);
		for(int i=l+2;i<=N;i++){
			int ix=query(i-2,i);
			int iy=query(i-1,i);
			if(ix==iy){
				if(ans[i-2]<ans[i-1])ans[i]=ans[i-1]-iy;
				else ans[i]=ans[i-1]+iy;
			}else{
				if(ans[i-2]<ans[i-1])ans[i]=ans[i-2]+ix;
				else ans[i]=ans[i-2]-ix;
			}
		}		
	}
	for(int i=1;i<=N;i++)
		answer(i,ans[i]);

}

Compilation message (stderr)

xylophone.cpp: In function 'void solve(int)':
xylophone.cpp:11:39: error: expected ';' before 'else'
   11 |                 if(query(m,N)==N-1)l=m
      |                                       ^
      |                                       ;
   12 |                 else r=m;
      |                 ~~~~                   
xylophone.cpp:15:17: error: 'ans' was not declared in this scope; did you mean 'abs'?
   15 |                 ans[l]=1;
      |                 ^~~
      |                 abs
xylophone.cpp:30:17: error: 'ans' was not declared in this scope; did you mean 'abs'?
   30 |                 ans[l]=1;
      |                 ^~~
      |                 abs
xylophone.cpp:45:26: error: 'ans' was not declared in this scope; did you mean 'abs'?
   45 |                 answer(i,ans[i]);
      |                          ^~~
      |                          abs