Submission #525362

#	Time	Username	Problem	Language	Result	Execution time	Memory
525362		safaricola	Xylophone (JOI18_xylophone)	C++17	100 / 100	108 ms	424 KiB

xylophone

#include "xylophone.h"

void solve(int N) {
	int ans[5010],diff1[5010],diff2[5010],mi,ma,miid,maid;
	bool greate[5010];
	for(int i=1; i<N; i++){
		diff1[i]=query(i,i+1);
		if(i!=N-1){
			diff2[i]=query(i,i+2);
		}
	}
	mi=1e9;
	ma=0;
	greate[1]=0;
	ans[1]=1;
	//greater=1, i<i+1;
	for(int i=1; i<N; i++){
		if(greate[i]){
			ans[i+1]=ans[i]+diff1[i];
			if(ans[i+1]>ma){
				ma=ans[i+1];
				maid=i+1;
			}
		}
		else{
			ans[i+1]=ans[i]-diff1[i];
			if(ans[i+1]<mi){
				mi=ans[i+1];
				miid=i+1;
			}
		}
		if(diff1[i+1]+diff1[i]==diff2[i]){
			greate[i+1]=greate[i];
		}else{
			greate[i+1]=!greate[i];
		}
	}
	if(mi<1){
		for(int i=1; i<=N; i++){
			ans[i]+=1-mi;
		}
	}
	if(miid>maid){
		for(int i=1; i<=N; i++){
			ans[i]=N+1-ans[i];
		}
	}
	//for(int i=1; i<=N; i++)cout<<ans[i]<<" ";
//		cout<<endl;
	for(int i = 1; i <= N; i++) {
		answer(i, ans[i]);
	}
}

Compilation message (stderr)

xylophone.cpp: In function 'void solve(int)':
xylophone.cpp:43:2: warning: 'miid' may be used uninitialized in this function [-Wmaybe-uninitialized]
   43 |  if(miid>maid){
      |  ^~
xylophone.cpp:43:2: warning: 'maid' may be used uninitialized in this function [-Wmaybe-uninitialized]

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