Submission #232634

#	Time	Username	Problem	Language	Result	Execution time	Memory
232634		kshitij_sodani	Xylophone (JOI18_xylophone)	C++17	100 / 100	99 ms	632 KiB

xylophone

#include <iostream>
#include <bits/stdc++.h>
using namespace std;
typedef int64_t llo;
#define mp make_pair
#define pb push_back
#define a first
#define b second
#include "xylophone.h"
/*void answer(int x,int y){
	cout<<x<<","<<y<<endl;
}
int query(int x,int y){
	cout<<x<<" "<<y<<endl;
	int yy;
	cin>>yy;
	return yy;
}*/
void solve(int n){
	if(n==2){
		answer(1,1);
		answer(2,2);
		return ;
	}
	int aa[n];
	for(int i=0;i<n-1;i++){
		aa[i]=query(i+1,i+2);
	}
	int bb[n];
	for(int i=0;i<n-2;i++){
		bb[i]=query(i+1,i+3);
	}
	int ans[n];
	ans[0]=0;
	int le=0;
	for(int i=0;i<n-1;i++){
		if(le==0){
			ans[i+1]=ans[i]+aa[i];
		}
		else{
			ans[i+1]=ans[i]-aa[i];
		}
		if(i<n-2){
			if(bb[i]==max(aa[i],aa[i+1])){
				le=1-le;
			}
		}
	}
	int mi;
/*	for(int i=0;i<n;i++){
		cout<<ans[i]<<" ";
	}
	cout<<endl;*/
	for(int i=0;i<n;i++){
		if(i==0){
			mi=ans[i];
		}
		else{
			mi=min(mi,ans[i]);
		}
	}
	int ind;
	int ind2;
	for(int i=0;i<n;i++){
		ans[i]+=(-mi+1);
		if(ans[i]==1){
			ind=i;
		}
		if(ans[i]==n){
			ind2=i;
		}
	}
	if(ind<ind2){
	//	cout<<11<<endl;
		for(int i=0;i<n;i++){
			answer(i+1,ans[i]);
		}
		return;
	}
	ans[0]=0;
	le=1;
	for(int i=0;i<n-1;i++){
		if(le==0){
			ans[i+1]=ans[i]+aa[i];
		}
		else{
			ans[i+1]=ans[i]-aa[i];
		}
		if(i<n-2){
			if(bb[i]==max(aa[i],aa[i+1])){
				le=1-le;
			}
		}
	}
	for(int i=0;i<n;i++){
		if(i==0){
			mi=ans[i];
		}
		else{
			mi=min(mi,ans[i]);
		}
	}
	for(int i=0;i<n;i++){
		ans[i]+=(-mi+1);
		if(ans[i]==1){
			ind=i;
		}
		if(ans[i]==n){
			ind2=i;
		}
	}
		for(int i=0;i<n;i++){
			answer(i+1,ans[i]);
		}
		return;


}
/*int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	solve(5);

	
	return 0;
}*/

Compilation message (stderr)

xylophone.cpp: In function 'void solve(int)':
xylophone.cpp:73:2: warning: 'ind' may be used uninitialized in this function [-Wmaybe-uninitialized]
  if(ind<ind2){
  ^~
xylophone.cpp:73:2: warning: 'ind2' may be used uninitialized in this function [-Wmaybe-uninitialized]

• Subtask 1: 11 / 11
• Subtask 2: 36 / 36
• Subtask 3: 53 / 53