Submission #208090

#	Time	Username	Problem	Language	Result	Execution time	Memory
208090		w4123	JJOOII 2 (JOI20_ho_t2)	C++17	100 / 100	24 ms	1792 KiB

ho_t2

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
using namespace std;
int main()
{
    int n, k;
    cin >> n >> k;
    string s;
    cin >> s;
    vector<int> v[3];
    for (int i = 0; i != n; i++)
    {
        if (s[i] == 'J')
        {
            v[0].push_back(i);
        }
        else if (s[i] == 'O')
        {
            v[1].push_back(i);
        }
        else
        {
            v[2].push_back(i);
        }
    }
    int res = 999999999;
    for (int i = 0; i != v[0].size(); i++)
    {
        if (i + k - 1 >= v[0].size())break;
        auto p = lower_bound(v[1].begin(), v[1].end(), v[0][i + k - 1]) - v[1].begin();
        if (p + k - 1 >= v[1].size())break;
        auto q = lower_bound(v[2].begin(), v[2].end(), v[1][p + k - 1]) - v[2].begin();
        if (q + k - 1 >= v[2].size())break;
        int ans = v[2][q + k - 1] - v[0][i] + 1 - 3 * k;
        res = min(res, ans);
    }
    cout << (res == 999999999 ? -1 : res);
}

Compilation message (stderr)

ho_t2.cpp: In function 'int main()':
ho_t2.cpp:29:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i != v[0].size(); i++)
                     ~~^~~~~~~~~~~~~~
ho_t2.cpp:31:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if (i + k - 1 >= v[0].size())break;
             ~~~~~~~~~~^~~~~~~~~~~~~~
ho_t2.cpp:33:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if (p + k - 1 >= v[1].size())break;
             ~~~~~~~~~~^~~~~~~~~~~~~~
ho_t2.cpp:35:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if (q + k - 1 >= v[2].size())break;
             ~~~~~~~~~~^~~~~~~~~~~~~~

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