Submission #853017

#	Time	Username	Problem	Language	Result	Execution time	Memory
853017		heeheeheehaaw	Floppy (RMI20_floppy)	C++17	100 / 100	82 ms	15060 KiB

floppy

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

using namespace std;

int n;
string bits;

void read_array(int subtask_id, const vector<int> &v)
{
    n = (int)v.size();
    stack<int> s;
    for(int i = 0; i < n; i++)
    {
        while(!s.empty() && v[i] > s.top())
            bits.push_back('1'), s.pop();
        bits.push_back('0');
        s.push(v[i]);
    }

    save_to_floppy(bits);
    return;
}

int blift[40005][20];
int qry(int x, int y)
{
    int rez = y;
    for(int j = 19; j >= 0; j--)
        if(blift[rez][j] >= x)
            rez = blift[rez][j];
    return rez;
}

vector<int> solve_queries(int subtask_id, int n, const string &bit, const vector<int> &a, const vector<int> &b)
{
    bits = bit;
    int cnt = 0;
    stack<int> s;
    for(int i = 0; i < n; i++)
    {
        while(bits[cnt] == '1')
            s.pop(), cnt++;
        if(!s.empty())
            blift[i + 1][0] = s.top() + 1;
        s.push(i), cnt++;
    }

    for(int j = 1; j <= 19; j++)
        for(int i = 1; i <= n; i++)
            blift[i][j] = blift[blift[i][j - 1]][j - 1];

    /*for(int j = 0; j <= 3; j++)
    {
        cout<<j<<":\n";
        for(int i = 1; i <= n; i++)
            cout<<blift[i][j]<<" ";
        cout<<'\n';
    }*/

    vector<int> rez;
    for(int i = 0; i < a.size(); i++)
    {
        int x = a[i], y = b[i];
        rez.push_back(qry(x + 1, y + 1) - 1);
        //cout<<rez[i]<<" ";
    }

    return rez;
}

/*int main()
{
    vector<int> __a = {40, 20, 30, 10};
    //read_array(1, __a);
    solve_queries(1, 4, "00100", {0, 0, 0, 0, 1, 1, 1, 2, 2, 3}, {0, 1, 2, 3, 1, 2, 3, 2, 3, 3 });

    return 0;
}*/

Compilation message (stderr)

floppy.cpp: In function 'std::vector<int> solve_queries(int, int, const string&, const std::vector<int>&, const std::vector<int>&)':
floppy.cpp:62:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |     for(int i = 0; i < a.size(); i++)
      |                    ~~^~~~~~~~~~
stub.cpp: In function 'void run2()':
stub.cpp:101:30: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  101 |     if (query_answers.size() != M) {
      |         ~~~~~~~~~~~~~~~~~~~~~^~~~

• Subtask 1: 7 / 7
• Subtask 2: 21 / 21
• Subtask 3: 72 / 72