Submission #987283

#	Time	Username	Problem	Language	Result	Execution time	Memory
987283		aykhn	JJOOII 2 (JOI20_ho_t2)	C++17	100 / 100	10 ms	3296 KiB

ho_t2

#include <bits/stdc++.h>
 
using namespace std;
 
#define int long long
#define inf 0x3F3F3F3F
 
signed main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n, K;
    cin >> n >> K;
    string s;
    cin >> s;
    vector<int> v[3];
    for (int i = 0; i < n; i++) v[(s[i] == 'O') + (s[i] == 'I') * 2].push_back(i);
    int ans = inf;
    for (int i = 0; i + K <= v[0].size(); i++)
    {
        auto it = lower_bound(v[1].begin(), v[1].end(), v[0][i + K - 1]);
        if (it == v[1].end()) break;
        int j = it - v[1].begin();
        if (j + K > v[1].size()) break;
        it = lower_bound(v[2].begin(), v[2].end(), v[1][j + K - 1]);
        if (it == v[2].end()) break;
        int k = it - v[2].begin();
        if (k + K > v[2].size()) break;
        ans = min(ans, (v[2][k + K - 1] - v[0][i] + 1) - 3 * K);
    }
    cout << (ans >= inf ? -1 : ans) << '\n';
}

Compilation message (stderr)

ho_t2.cpp: In function 'int main()':
ho_t2.cpp:19:27: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |     for (int i = 0; i + K <= v[0].size(); i++)
      |                     ~~~~~~^~~~~~~~~~~~~~
ho_t2.cpp:24:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |         if (j + K > v[1].size()) break;
      |             ~~~~~~^~~~~~~~~~~~~
ho_t2.cpp:28:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |         if (k + K > v[2].size()) break;
      |             ~~~~~~^~~~~~~~~~~~~

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