Submission #249516

#	Time	Username	Problem	Language	Result	Execution time	Memory
249516		Vimmer	Poklon (COCI17_poklon7)	C++14	0 / 120	527 ms	262148 KiB

poklon

#include <bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>

#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("-O3")
#pragma GCC optimize("Ofast")
//#pragma GCC optimize("fast-math")
//#pragma GCC optimize("no-stack-protector")

#define F first
#define S second
#define sz(x) int(x.size())
#define pb push_back
#define pf push_front
#define N 1000010
#define M ll(1e9 + 7)
#define inf 1e9 + 1e9

using namespace std;
//using namespace __gnu_pbds;

typedef long double ld;
typedef long long ll;
typedef unsigned long long ull;
typedef short int si;
typedef array <int, 6> a6;

//typedef tree <int, null_type, less_equal<int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;

bool mk[N][2];

pair <ll, ll> val[N];

vector <char> tranc(ll x)
{
    vector <char> ans; ans.clear();

    while (x > 0)
    {
        if (x % 2) ans.pb('1');
          else ans.pb('0');

        x /= 2;
    }

    reverse(ans.begin(), ans.end());

    return ans;
}

vector <char> &dfs(ll v)
{
    vector <char> l, r;

    if (mk[v][0]) l = dfs(val[v].F); else l = tranc(val[v].F);

    if (mk[v][1]) r = dfs(val[v].S); else r = tranc(val[v].S);

    if (sz(l) < sz(r)) swap(l, r);

    if (sz(l) != sz(r)) {l.pb('0'); return l;}

    for (int i = 0; i < sz(l); i++)
    {
        if (l[i] == r[i]) continue;

        if (r[i] == '1') swap(l, r);

        break;
    }

    l.pb('0'); return l;
}

int main()
{
    //freopen("input.txt", "r", stdin); freopen("output4.txt", "w", stdout);

    ios_base::sync_with_stdio(0); istream::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    ll n;

    cin >> n;

    for (ll i = 1; i <= n; i++)
    {
        ll l, r;

        cin >> l >> r;

        if (l < 0) val[i].F = abs(l); else {mk[i][0] = 1; val[i].F = l;}

        if (r < 0) val[i].S = abs(r); else {mk[i][1] = 1; val[i].S = r;}
    }

    vector <char> gr = dfs(1);

    for (auto it : gr) cout << it;
}

Compilation message (stderr)

poklon.cpp: In function 'std::vector<char>& dfs(ll)':
poklon.cpp:54:19: warning: reference to local variable 'l' returned [-Wreturn-local-addr]
     vector <char> l, r;
                   ^
poklon.cpp:54:19: warning: reference to local variable 'l' returned [-Wreturn-local-addr]

• Subtask 1: 0 / 120