Submission #255414

#	Time	Username	Problem	Language	Result	Execution time	Memory
255414		ChrisT	Xylophone (JOI18_xylophone)	C++17	Compilation error	0 ms	0 KiB

xylophone

#include<bits/stdc++.h>
#include "xylophone.h"
using namespace std;
bool same[MN]; int diff[MN];
void solve (int n) {
	for (int i = 1; i < n; i++) diff[i] = query(i,i+1);
	for (int i = 1; i + 1 < n; i++) same[i+1] = query(i,i+2) == diff[i] + diff[i+1];
	for (int ree = 0; ree <= 1; ree++) {
		int lt = ree; vector<int> perm(n+1);
		for (int st = 1; st <= n; st++) {
			lt = ree; perm[1] = st;
			for (int j = 2; j <= n; j++) {
				if (lt) perm[j] = perm[j-1] - diff[j-1];
				else perm[j] = perm[j-1] + diff[j-1];
				if (perm[j] < 1 || perm[j] > n) goto fail;
				lt ^= same[j] ^ 1;
			}
			for (int i = 1; i <= n; i++) {
				if (perm[i] == 1) break;
				if (perm[i] == n) goto fail;
			}
			for (int i = 1; i <= n; i++) answer(i,perm[i]);
			return;
			fail:;
		}
	}
	assert(0);
}

Compilation message (stderr)

xylophone.cpp:4:11: error: 'MN' was not declared in this scope
 bool same[MN]; int diff[MN];
           ^~
xylophone.cpp:4:25: error: 'MN' was not declared in this scope
 bool same[MN]; int diff[MN];
                         ^~
xylophone.cpp: In function 'void solve(int)':
xylophone.cpp:6:30: error: 'diff' was not declared in this scope
  for (int i = 1; i < n; i++) diff[i] = query(i,i+1);
                              ^~~~
xylophone.cpp:6:30: note: suggested alternative: 'div'
  for (int i = 1; i < n; i++) diff[i] = query(i,i+1);
                              ^~~~
                              div
xylophone.cpp:7:34: error: 'same' was not declared in this scope
  for (int i = 1; i + 1 < n; i++) same[i+1] = query(i,i+2) == diff[i] + diff[i+1];
                                  ^~~~
xylophone.cpp:7:34: note: suggested alternative: 'stime'
  for (int i = 1; i + 1 < n; i++) same[i+1] = query(i,i+2) == diff[i] + diff[i+1];
                                  ^~~~
                                  stime
xylophone.cpp:7:62: error: 'diff' was not declared in this scope
  for (int i = 1; i + 1 < n; i++) same[i+1] = query(i,i+2) == diff[i] + diff[i+1];
                                                              ^~~~
xylophone.cpp:7:62: note: suggested alternative: 'div'
  for (int i = 1; i + 1 < n; i++) same[i+1] = query(i,i+2) == diff[i] + diff[i+1];
                                                              ^~~~
                                                              div
xylophone.cpp:13:35: error: 'diff' was not declared in this scope
     if (lt) perm[j] = perm[j-1] - diff[j-1];
                                   ^~~~
xylophone.cpp:13:35: note: suggested alternative: 'div'
     if (lt) perm[j] = perm[j-1] - diff[j-1];
                                   ^~~~
                                   div
xylophone.cpp:14:32: error: 'diff' was not declared in this scope
     else perm[j] = perm[j-1] + diff[j-1];
                                ^~~~
xylophone.cpp:14:32: note: suggested alternative: 'div'
     else perm[j] = perm[j-1] + diff[j-1];
                                ^~~~
                                div
xylophone.cpp:16:11: error: 'same' was not declared in this scope
     lt ^= same[j] ^ 1;
           ^~~~
xylophone.cpp:16:11: note: suggested alternative: 'stime'
     lt ^= same[j] ^ 1;
           ^~~~
           stime