Submission #784262

#	Time	Username	Problem	Language	Result	Execution time	Memory
784262		tvladm2009	Xylophone (JOI18_xylophone)	C++17	Compilation error	0 ms	0 KiB

xylophone

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

/// i almost made my last submission to pass

const int N = 5000 + 7;
int n;
int d2[N];
int d3[N];
int dir[N];
bool same[N];
int a[N];
int b[N];
int where[N];
 
 
bool isok() {
  int mn = a[1];
  for (int i = 1; i < n; i++) {
    a[i + 1] = a[i] + dir[i] * d2[i];
    mn = min(mn, a[i + 1]);
  }
  for (int i = 1; i <= n; i++) {
    a[i] -= (mn - 1);
  }
  for (int i = 1; i <= n; i++) {
    where[i] = 0;
  }
  for (int i = 1; i <= n; i++) {
    if (a[i] < 1 || a[i] > n) {
      return false;
    }
    if (where[a[i]]) {
      return false;
    }
    where[a[i]] = i;
  }
  return where[1] <= where[n];
}
 
void solve(int nn) {
  n = nn;
  for (int i = 1; i + 1 <= n; i++) {
    d2[i] = query(i, i + 1);
  }
  for (int i = 1; i + 2 <= n; i++) {
    d3[i] = query(i, i + 2);
  }
  /**
 
  a[i] - a[i + 1] = +- d2[i]
 
  **/
  dir[1] = +1;
  for (int i = 1; i + 2 <= n; i++) {
    if (d2[i] + d2[i + 1] == d3[i]) {
      /// direction[i] = direction[i + 1]
      dir[i + 1] = dir[i];
    } else {
      /// direction[i] != direction[i + 1]
      dir[i + 1] = -dir[i];
    }
  }
  if (!isok()) {
    for (int i = 1; i < n; i++) {
      dir[i] *= -1;
    }
    assert(isok());
  }
  for (int i = 1; i <= n; i++) {
    answer(i, a[i]);
  }
  return 0;
}

Compilation message (stderr)

xylophone.cpp: In function 'void solve(int)':
xylophone.cpp:75:10: error: return-statement with a value, in function returning 'void' [-fpermissive]
   75 |   return 0;
      |          ^