Submission #745748

#	Time	Username	Problem	Language	Result	Execution time	Memory
745748		owoovo	JJOOII 2 (JOI20_ho_t2)	C++14	100 / 100	10 ms	2032 KiB

ho_t2

#include<bits/stdc++.h>
#define ll long long
using namespace std;
int n,k;
string s;
vector<int> j,o,x;
int main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    cin>>n>>k>>s;
    int ans=n;
    for(int i=0;i<s.size();i++){
        if(s[i]=='J')j.push_back(i);
        else if(s[i]=='O')o.push_back(i);
        else x.push_back(i);
    }
    for(int i=0;i+k<=j.size();i++){
        int now=j[i+k-1];
        now=lower_bound(o.begin(),o.end(),now)-o.begin();
        if(now+k>o.size())break;
        now=o[now+k-1];
        now=lower_bound(x.begin(),x.end(),now)-x.begin();
        if(now+k>x.size())break;
        now=x[now+k-1];
        ans=min(now-j[i]+1-k*3,ans);
    }
    if(ans==n){
        cout<<"-1\n";
    }else{
        cout<<ans<<"\n";
    }
    return 0;
}

Compilation message (stderr)

ho_t2.cpp: In function 'int main()':
ho_t2.cpp:12:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |     for(int i=0;i<s.size();i++){
      |                 ~^~~~~~~~~
ho_t2.cpp:17:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |     for(int i=0;i+k<=j.size();i++){
      |                 ~~~^~~~~~~~~~
ho_t2.cpp:20:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |         if(now+k>o.size())break;
      |            ~~~~~^~~~~~~~~
ho_t2.cpp:23:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |         if(now+k>x.size())break;
      |            ~~~~~^~~~~~~~~

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