Submission #204395

#	Time	Username	Problem	Language	Result	Execution time	Memory
204395		Sho10	Election (BOI18_election)	C++14	0 / 100	11 ms	376 KiB

election

/*
ID: Sho10
LANG: C++
*/
#include <bits/stdc++.h> //Andrei Alexandru a.k.a Sho10
#define ll long long int
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#define all(a) (a).begin(), (a).end()
#define sz size
#define f first
#define s second
#define pb push_back
#define er erase
#define in insert
#define mp make_pair
#define pi pair
#define rc(s) return cout<<s,0
#define endl '\n'
#define mod 1000000007
#define PI 3.14159265359
#define CODE_START  ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
using namespace std;
ll n,q,l,r;
string s,a;
int32_t main(){
CODE_START;
cin>>n;
cin>>s;
cin>>q;
while(q--){
    cin>>l>>r;
    l--;
    r--;
    ll ans=0,s1=0;
   a=s.substr(l,(r-l+1));
if(a[0]=='T'){
    a[0]='o';
    ans++;
    s1=0;
}else s1=1;
for(ll i=1;i<a.size();i++)
{
  if(a[i]=='T'){
    s1--;
  }else if(a[i]=='C'){
      s1++;
  }
  if(s1<0){
    ans++;
    a[i]='o';
    s1++;
  }
}
s1=0;
if(a[a.size()-1]=='T'){
    a[a.size()-1]='o';
    ans++;
}else s1=1;
for(ll i=a.size()-2;i>=0;i--)
{
    if(a[i]=='T'){
        s1--;
    }else if(a[i]=='C'){
    s1++;
    }
    if(s1<0){
        ans++;
        s1++;
        a[i]='o';
    }
}
cout<<ans<<endl;
}
}

Compilation message (stderr)

election.cpp: In function 'int32_t main()':
election.cpp:42:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 for(ll i=1;i<a.size();i++)
            ~^~~~~~~~~

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