Submission #475273

#	Time	Username	Problem	Language	Result	Execution time	Memory
475273		stefantaga	Floppy (RMI20_floppy)	C++14	100 / 100	132 ms	13772 KiB

floppy

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

using namespace std;
int v2[40005],n;
stack <int> st;
void read_array(int subtask_id, const std::vector<int> &x) {
    std::string  bits;
    n=x.size();
    int i;
    for (i=1;i<=n;i++)
    {
        v2[i]=x[i-1];
    }
    for (i=1;i<=n;i++)
    {
        while (!st.empty()&&v2[st.top()]<v2[i])
        {
            st.pop();
            bits+="1";
        }
        st.push(i);
        bits+="0";
    }
    save_to_floppy(bits);
}
int stanga[50005];
vector <pair <int,int> >  queryuri;
pair <int,int> arb[160005];
void update(int st,int dr,int nod,int poz,int val)
{
    if (st==dr)
    {
        arb[nod].first=val;
        arb[nod].second=poz;
        return;
    }
    int mij=(st+dr)/2;
    if (poz<=mij)
    {
        update(st,mij,2*nod,poz,val);
    }
    else
    {
        update(mij+1,dr,2*nod+1,poz,val);
    }
    if (arb[2*nod].first<arb[2*nod+1].first)
    {
        arb[nod]=arb[2*nod];
    }
    else
    {
        arb[nod]=arb[2*nod+1];
    }
}
pair <int,int>  query(int st,int dr,int nod,int ua,int ub)
{
    if (ua<=st&&dr<=ub)
    {
        return arb[nod];
    }
    int mij=(st+dr)/2; pair <int,int> r1={1e9,0},r2={1e9,0};
    if (ua<=mij)
    {
        r1=query(st,mij,2*nod,ua,ub);
    }
    if (mij<ub)
    {
        r2=query(mij+1,dr,2*nod+1,ua,ub);
    }
    if (r1.first<r2.first)
    {
        return r1;
    }
    return r2;
}
std::vector<int> solve_queries(int subtask_id, int N,
        const std::string &bits,
        const std::vector<int> &a, const std::vector<int> &b) {
    n=N;
    int i,poz;
    while (!st.empty())st.pop();
    poz=1;
    for (i=0;i<bits.size();i++)
    {
        if (bits[i]=='0')
        {
            if (st.empty())
            {
                stanga[poz]=0;
            }
            else
            {
                stanga[poz]=st.top();
            }
            st.push(poz);
            poz++;
        }
        else
        {
            st.pop();
        }
    }
    for (i=1;i<=n;i++)
    {
        update(1,n,1,i,stanga[i]);
    }
    for (i=0;i<a.size();i++)
    {
        queryuri.push_back({a[i]+1,b[i]+1});
    }
    vector <int> answers;
    for (i=0;i<queryuri.size();i++)
    {
        answers.push_back(query(1,n,1,queryuri[i].first,queryuri[i].second).second-1);
    }
    return answers;
}

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:86:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   86 |     for (i=0;i<bits.size();i++)
      |              ~^~~~~~~~~~~~
floppy.cpp:110:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  110 |     for (i=0;i<a.size();i++)
      |              ~^~~~~~~~~
floppy.cpp:115:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  115 |     for (i=0;i<queryuri.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