Submission #981347

#	Time	Username	Problem	Language	Result	Execution time	Memory
981347		Amaarsaa	Xylophone (JOI18_xylophone)	C++14	0 / 100	1 ms	608 KiB

xylophone

#include<bits/stdc++.h>
#include "xylophone.h"

using namespace std;

int a[5002], ans[5002];

void solve(int N) {
	int ind, mid,i, s,x1, x2, p, n = N, lo, hi;
	
	int r, b[5005], c[5005], ens[5005];
	ans[1] = 0;
	ans[2] = 0 + query(1, 2);
	r = ans[2];
	int mx = ans[2];
	for ( i = 3; i <= n; i ++) {
		s = query(i - 1, i);
		p = query(i - 2, i);
		b[i]= s;
		c[i] = p;
		x1 = ans[i - 1] - s;
		x2 = ans[i - 1] + s;
		if ( max(x1, max(ans[i - 1], ans[i - 2])) - min(x1, min(ans[i - 1], ans[i - 2])) == p) {
			ans[i] = x1;
		} 
		if ( max(x2, max(ans[i - 1], ans[i - 2])) - min(x2, min(ans[i - 1], ans[i - 2])) == p) {
			ans[i] = x2;
		} 
		mx = max(mx,ans[i]);
	}
	int j = 1;
	for (i = 1; i <= n; i ++) {
		ens[i] = ans[i]= ans[i] + (n - mx);
		if ( ans[i] == n) j = i;
	}
	sort ( ens + 1, ens + n + 1);
	int can = 1;
	for (i =1; i <= n; i ++) if ( ens[i] != i) can = 0;
	if (  can && query(1, j - 1) != n - 1) {
//		for (i = 1; i <= n; i ++) cout << ans[i] << " ";
		for (i = 1; i <= n; i ++) answer(i, ans[i]);
		return ;
	}
	ans[1] = 0;
	ans[2] = -r;
	mx = 0;
	for ( i = 3; i <= n; i ++) {
		s = b[i];
		p = c[i];
		x1 = ans[i - 1] - s;
		x2 = ans[i - 1] + s;
		if ( max(x1, max(ans[i - 1], ans[i - 2])) - min(x1, min(ans[i - 1], ans[i - 2])) == p) {
			ans[i] = x1;
		} 
		if ( max(x2, max(ans[i - 1], ans[i - 2])) - min(x2, min(ans[i - 1], ans[i - 2])) == p) {
			ans[i] = x2;
		} 
		mx = max(mx,ans[i]);
	}
	for (i = 1; i <= n; i ++) ans[i] = ans[i] + (n - mx);
//	for (i = 1; i <= n; i ++) cout << ans[i] << " ";
	for (i =1 ; i<= n; i++) answer(i, ans[i]);
}

Compilation message (stderr)

xylophone.cpp: In function 'void solve(int)':
xylophone.cpp:9:6: warning: unused variable 'ind' [-Wunused-variable]
    9 |  int ind, mid,i, s,x1, x2, p, n = N, lo, hi;
      |      ^~~
xylophone.cpp:9:11: warning: unused variable 'mid' [-Wunused-variable]
    9 |  int ind, mid,i, s,x1, x2, p, n = N, lo, hi;
      |           ^~~
xylophone.cpp:9:38: warning: unused variable 'lo' [-Wunused-variable]
    9 |  int ind, mid,i, s,x1, x2, p, n = N, lo, hi;
      |                                      ^~
xylophone.cpp:9:42: warning: unused variable 'hi' [-Wunused-variable]
    9 |  int ind, mid,i, s,x1, x2, p, n = N, lo, hi;
      |                                          ^~

• Subtask 1: 0 / 11
• Subtask 2: 0 / 36
• Subtask 3: 0 / 53