Submission #484698

#	Time	Username	Problem	Language	Result	Execution time	Memory
484698		Jarif_Rahman	JJOOII 2 (JOI20_ho_t2)	C++17	100 / 100	12 ms	2016 KiB

ho_t2

#include <bits/stdc++.h>
#define pb push_back
#define f first
#define sc second
using namespace std;
typedef long long int ll;
typedef string str;
const int inf = 1e9;
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n, k; str s; cin >> n >> k >> s;

    vector<int> J, O, I;
    for(int i = 0; i < n; i++){
        if(s[i] == 'J') J.pb(i);
        if(s[i] == 'O') O.pb(i);
        if(s[i] == 'I') I.pb(i);
    }

    int ans = inf;

    for(int i = k-1; i < O.size(); i++){
        int cur = n;
        cur-=3*k;

        auto it = lower_bound(J.begin(), J.end(), O[i-k+1]);
        int j = it-J.begin();
        j--;
        j-=k-1;
        if(j < 0) continue;
        cur-=J[j];

        it = lower_bound(I.begin(), I.end(), O[i]);
        if(it == I.end()) continue;
        j = it-I.begin();
        j+=k-1;
        if(j >= I.size()) continue;
        cur-=n-I[j]-1;

        ans = min(ans, cur);
    }

    if(ans == inf) ans = -1;
    cout << ans << "\n";
}

Compilation message (stderr)

ho_t2.cpp: In function 'int main()':
ho_t2.cpp:23:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |     for(int i = k-1; i < O.size(); i++){
      |                      ~~^~~~~~~~~~
ho_t2.cpp:38:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |         if(j >= I.size()) continue;
      |            ~~^~~~~~~~~~~

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