Submission #565569

#	Time	Username	Problem	Language	Result	Execution time	Memory
565569		MrDeboo	Election (BOI18_election)	C++17	28 / 100	3063 ms	780 KiB

election

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
// #define int long long
#define endl '\n'
using namespace std;
using namespace __gnu_pbds;
using ordered_set = tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update>;
signed main(){
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    int n,q;
    cin>>n;
    string s;
    cin>>s;
    vector<bool>v(n);
    for(int i=0;i<n;i++)v[i]=(s[i]=='C');
    vector<bool>V(n);
    cin>>q;
    while(q--){
        int l,r;
        cin>>l>>r;
        l--;r--;
        int cur=0,ans=0;
        for(int i=l;i<=r;i++){
            V[i]=0;
            cur+=(v[i]?1:-1);
            if(cur<0){
                ans++;
                V[i]=1;
                cur=0;
            }
        }
        cur=0;
        for(int i=r;i>=l;i--){
            if(V[i])continue;
            cur+=(v[i]?1:-1);
            if(cur<0){
                ans++;
                V[i]=1;
                cur=0;
            }
        }
        cout<<ans<<endl;
    }
}

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