Submission #483065

#	Time	Username	Problem	Language	Result	Execution time	Memory
483065		Lam_lai_cuoc_doi	popa (BOI18_popa)	C++17	0 / 100	1 ms	420 KiB

popa

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

using namespace std;
using ll = long long;
using ld = long double;
using ull = unsigned long long;

template <class T>
void read(T &x)
{
    x = 0;
    register int c;
    while ((c = getchar()) && (c > '9' || c < '0'))
        ;
    for (; c >= '0' && c <= '9'; c = getchar())
        x = x * 10 + c - '0';
}

constexpr bool typetest = 0;
constexpr int N = 1e3 + 5;
constexpr ll Inf = 1e17;
int *l, *r;

int solve(int left, int right)
{
    if (left == right)
        return left;

    int le, mid, hi;

    while (le <= hi)
    {
        mid = (le + hi) / 2;
        if (query(left, mid, left, right))
            hi = mid - 1;
        else
            le = mid + 1;
    }

    int root = le;

    if (root > left)
        l[root] = solve(left, root - 1);
    if (root < right)
        r[root] = solve(root + 1, right);

    return root;
}

int solve(int n, int *Left, int *Right)
{
    l = Left;
    r = Right;

    for (int i = 0; i < n; ++i)
        l[i] = r[i] = -1;

    return solve(0, n - 1);
}
/*

void Read()
{
}

void Solve()
{
}

int32_t main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    if (fopen("xor.INP", "r"))
    {
        freopen("xor.inp", "r", stdin);
        freopen("xor.out", "w", stdout);
    }
    int t(1);
    if (typetest)
        cin >> t;
    for (int _ = 1; _ <= t; ++_)
    {
        // cout << "Case #" << _ << ": ";
        Read();
        Solve();
    }
    // cerr << "\nTime elapsed: " << 1000 * clock() / CLOCKS_PER_SEC << "ms\n";
}

/**/

Compilation message (stderr)

popa.cpp:93:1: warning: "/*" within comment [-Wcomment]
   93 | /**/
      |  
popa.cpp: In function 'void read(T&)':
popa.cpp:13:18: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   13 |     register int c;
      |                  ^
popa.cpp: In function 'int solve(int, int)':
popa.cpp:46:24: warning: 'le' may be used uninitialized in this function [-Wmaybe-uninitialized]
   46 |         r[root] = solve(root + 1, right);
      |                   ~~~~~^~~~~~~~~~~~~~~~~
popa.cpp:34:19: warning: 'hi' may be used uninitialized in this function [-Wmaybe-uninitialized]
   34 |         mid = (le + hi) / 2;
      |               ~~~~^~~~~

• Subtask 1: 0 / 37
• Subtask 2: 0 / 24
• Subtask 3: 0 / 39