Submission #991549

#	Time	Username	Problem	Language	Result	Execution time	Memory
991549		vicvic	JJOOII 2 (JOI20_ho_t2)	C++11	100 / 100	10 ms	2096 KiB

ho_t2

#include <iostream>
#include <string>
#include <cstring>
#include <vector>
using namespace std;
const int nmax=2e5;
int n, k;
string s;
vector <int> poz_j, poz_o, poz_i;
int main()
{
    cin >> n >> k >> s;
    for (int i=0;s[i];i++)
    {
        if (s[i]=='J')
        {
            poz_j.push_back (i);
        }
        else if (s[i]=='O')
        {
            poz_o.push_back (i);
        }
        else poz_i.push_back (i);
    }
    if (poz_j.size()<k || poz_i.size()<k || poz_o.size()<k)
    {
        cout << -1;
        return 0;
    }
    bool found_sol=0;
    int ret=nmax+5;
    for (int i=k-1;i<poz_j.size();i++)
    {
        int rez_o=-1, st=0, dr=poz_o.size()-1;
        while (st<=dr)
        {
            int mij = (st+dr) >> 1;
            if (poz_o[mij]<=poz_j[i])
            {
                rez_o=mij;
                st=mij+1;
            }
            else dr=mij-1;
        }
        rez_o+=k;
        if (rez_o>poz_o.size()-1)
        {
            break;
        }
        int rez_i=-1;
        st=0, dr=poz_i.size()-1;
        while (st<=dr)
        {
            int mij = (st+dr) >> 1;
            if (poz_i[mij]<=poz_o[rez_o])
            {
                rez_i=mij;
                st=mij+1;
            }
            else dr=mij-1;
        }
        rez_i+=k;
        if (rez_i>poz_i.size()-1)
        {
            break;
        }
        int rez_j=i-k+1;
        found_sol=1;
        ret=min (ret, poz_i[rez_i]-poz_j[rez_j]+1-3*k);
    }
    if (!found_sol)
    {
        cout << -1;
        return 0;
    }
    cout << ret;
    return 0;
}

Compilation message (stderr)

ho_t2.cpp: In function 'int main()':
ho_t2.cpp:25:21: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   25 |     if (poz_j.size()<k || poz_i.size()<k || poz_o.size()<k)
      |         ~~~~~~~~~~~~^~
ho_t2.cpp:25:39: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   25 |     if (poz_j.size()<k || poz_i.size()<k || poz_o.size()<k)
      |                           ~~~~~~~~~~~~^~
ho_t2.cpp:25:57: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   25 |     if (poz_j.size()<k || poz_i.size()<k || poz_o.size()<k)
      |                                             ~~~~~~~~~~~~^~
ho_t2.cpp:32:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |     for (int i=k-1;i<poz_j.size();i++)
      |                    ~^~~~~~~~~~~~~
ho_t2.cpp:46:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |         if (rez_o>poz_o.size()-1)
      |             ~~~~~^~~~~~~~~~~~~~~
ho_t2.cpp:63:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   63 |         if (rez_i>poz_i.size()-1)
      |             ~~~~~^~~~~~~~~~~~~~~

• Subtask 1: 1 / 1
• Subtask 2: 12 / 12
• Subtask 3: 87 / 87