Submission #371075

#	Time	Username	Problem	Language	Result	Execution time	Memory
371075		Atill83	Poklon (COCI17_poklon7)	C++14	66 / 120	1106 ms	262148 KiB

poklon

#include <bits/stdc++.h>
#define ff first
#define ss second
#define endl '\n'
using namespace std;
const long long INF = (long long) 1e18;
const int mod = (int) 1e9+7;
const int MAXN = (int) 1e6+5;

typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
ll n;
int l[MAXN], r[MAXN];
int Gidx = 0;
string idx[MAXN];
vector<int> hsh[MAXN];
int do_it(int v){
    assert(Gidx <= MAXN);
    if(v < 0){
        int cur = -v;
        int pow = 1;
        while(cur){
            idx[Gidx] += (char)('0' + cur % 2);
            hsh[Gidx].push_back(((hsh[Gidx].empty() ? 0 : hsh[Gidx].back()) + pow * (cur % 2) % mod) % mod);
            pow = pow * 2 % mod;
            cur /= 2;
        }
        reverse(idx[Gidx].begin(), idx[Gidx].end()); 
        reverse(hsh[Gidx].begin(), hsh[Gidx].end());
        return Gidx++;
    }

    int left = do_it(l[v]), right = do_it(r[v]);
    int winner = -1;
    if(idx[left].size() != idx[right].size()){
        winner = (idx[left].size() > idx[right].size() ? left : right);
    }else{
        int l = 0, r = idx[left].size() - 1;
        
        while(l < r){
            int m = (l + r + 1) / 2;
            if(hsh[left][m] != hsh[right][m])
                r = m - 1;
            else
                l = m;
        }
        
        l++;
        if(l == idx[left].size() || idx[left][l] == '1')
            winner = left;
        else
            winner = right;
    }

    idx[winner] += '0';
    hsh[winner].push_back(hsh[winner].back() * 2 % mod);
    return winner; 
}



int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);cout.tie(nullptr);

    #ifdef Local
        freopen("C:/Users/Admin/Desktop/Yazilim/C/IO/int.txt","r",stdin);
        freopen("C:/Users/Admin/Desktop/Yazilim/C/IO/out.txt","w",stdout);
    #endif

    cin>>n;

    for(int i = 1; i <= n; i++)
        cin>>l[i]>>r[i];

    string & cev = idx[do_it(1)];

    cout<<cev<<endl;



    #ifdef Local
        cout<<endl<<fixed<<setprecision(2)<<1000.0 * clock() / CLOCKS_PER_SEC<< " milliseconds ";
    #endif
}

Compilation message (stderr)

poklon.cpp: In function 'int do_it(int)':
poklon.cpp:51:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |         if(l == idx[left].size() || idx[left][l] == '1')
      |            ~~^~~~~~~~~~~~~~~~~~~

• Subtask 1: 66 / 120