Submission #861341

#	Time	Username	Problem	Language	Result	Execution time	Memory
861341		Aiperiii	Election (BOI18_election)	C++17	28 / 100	3033 ms	1576 KiB

election

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define all(x) x.begin(),x.end()
#define ff first
#define ss second
signed main(){
    ios::sync_with_stdio(false);
    cin.tie(NULL);
    int n,q;
    cin>>n;
    string s;
    cin>>s;
    cin>>q;
    while(q--){
        int l,r;
        cin>>l>>r;l--;r--;
        int ans=0;
        vector <int> nu(s.size(),-1);
        int cnt2=0,cnt1=0;
        for(int i=l;i<=r;i++){
            if(s[i]=='C')cnt1++;
            else cnt2++;
            if(cnt2>cnt1){
                nu[i]=0;
                ans++;
                cnt2--;
            }
        }
        cnt2=0;cnt1=0;
        for(int i=r;i>=l;i--){
            if(s[i]=='C')cnt1++;
            else if(s[i]=='T' && nu[i]==-1)cnt2++;
            if(cnt2>cnt1){
                nu[i]=0;
                ans++;
                cnt2--;
            }
        }
        cout<<ans<<"\n";
    }
}

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