Submission #565594

#	Time	Username	Problem	Language	Result	Execution time	Memory
565594		RealSnake	Xylophone (JOI18_xylophone)	C++14	Compilation error	0 ms	0 KiB

xylophone

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

void solve(int n) {
    int l = 1, r = n, j = 1;
    int a[n + 1];
    for(int i = 1; i <= n; i++) {
        int x = query(i, n);
        if(x == n - 1)
            j = i;
        else
            break;
    }
    a[j] = 1;
    int b[n + 1];
    for(int i = j - 1; i >= 0; i--) {
        int x = query(i, i + 1);
        b[i] = x;
        if(i == j - 1) {
            a[i] = x + 1;
            continue;
        }
        int y = query(i, i + 2);
        if(a[i + 1] < a[i + 2]) {
            if(a[i + 1] + x < a[i + 2]) {
                if(y == b[i + 1])
                    a[i] = a[i + 1] + x;
                else
                    a[i] = a[i + 1] - x;
            }
            else {
                if(y == a[i + 2] - (a[i + 1] - x))
                    a[i] = a[i + 1] - x;
                else
                    a[i] = a[i + 1] + x;
            }
        }
        else {
            if(a[i + 1] - x > a[i + 2]) {
                if(y == b[i + 1])
                    a[i] = a[i + 1] - x;
                else
                    a[i] = a[i + 1] + x;
            }
            else {
                if(y == (a[i + 1] + x) - a[i + 2])
                    a[i] = a[i + 1] + x;
                else
                    a[i] = a[i + 1] - x;
            }
        }
    }
    for(int i = j + 1; i <= n; i++) {
        int x = query(i - 1, i);
        b[i] = x;
        if(i == j + 1) {
            a[i] = x + 1;
            continue;
        }
        int y = query(i - 2, i);
        if(a[i - 1] < a[i - 2]) {
            if(a[i - 1] + x < a[i - 2]) {
                if(y == b[i - 1])
                    a[i] = a[i - 1] + x;
                else
                    a[i] = a[i - 1] - x;
            }
            else {
                if(y == a[i - 2] - (a[i - 1] - x))
                    a[i] = a[i - 1] - x;
                else
                    a[i] = a[i - 1] + x;
            }
        }
        else {
            if(a[i - 1] - x > a[i - 2]) {
                if(b[i - 1] == y)
                    a[i] = a[i - 1] - x;
                else
                    a[i] = a[i - 1] + x;
            }
            else {
                if(y == (a[i - 1] + x) - a[i - 2])
                    a[i] = a[i - 1] + x;
                else
                    a[i] = a[i - 1] - x;
            }
        }
    }
    for(int i = 1; i <= n; i++)
        ans(i, a[i]);
}

Compilation message (stderr)

xylophone.cpp: In function 'void solve(int)':
xylophone.cpp:91:9: error: 'ans' was not declared in this scope; did you mean 'abs'?
   91 |         ans(i, a[i]);
      |         ^~~
      |         abs
xylophone.cpp:5:9: warning: unused variable 'l' [-Wunused-variable]
    5 |     int l = 1, r = n, j = 1;
      |         ^
xylophone.cpp:5:16: warning: unused variable 'r' [-Wunused-variable]
    5 |     int l = 1, r = n, j = 1;
      |                ^