Submission #942591

#	Time	Username	Problem	Language	Result	Execution time	Memory
942591		irmuun	Election (BOI18_election)	C++17	28 / 100	3048 ms	1088 KiB

election

#include<bits/stdc++.h>

using namespace std;

#define ll long long
#define pb push_back
#define ff first
#define ss second
#define all(s) s.begin(),s.end()
#define rall(s) s.rbegin(),s.rend()

int main(){
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    ll n;
    cin>>n;
    string s;
    cin>>s;
    ll q;
    cin>>q;
    bool del[n+5];
    while(q--){
        ll l,r;
        cin>>l>>r;
        fill(del,del+n,0);
        string t=s.substr(l-1,r-l+1);
        ll cur=0,cnt=0;
        for(ll i=0;i<t.size();i++){
            if(del[i]==false){
                if(t[i]=='C') cur++;
                else cur--;
                if(cur<0){
                    cnt++;
                    cur++;
                    del[i]=true;
                }
            }
        }
        cur=0;
        for(ll i=t.size()-1;i>=0;i--){
            if(del[i]==false){
                if(t[i]=='C') cur++;
                else cur--;
                if(cur<0){
                    cnt++;
                    cur++;
                    del[i]=true;
                }
            }
        }
        cout<<cnt<<"\n";
    }
}

Compilation message (stderr)

election.cpp: In function 'int main()':
election.cpp:27:21: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |         for(ll i=0;i<t.size();i++){
      |                    ~^~~~~~~~~

• Subtask 1: 28 / 28
• Subtask 2: 0 / 54
• Subtask 3: 0 / 18