Submission #434113

#	Time	Username	Problem	Language	Result	Execution time	Memory
434113		AmineTrabelsi	Election (BOI18_election)	C++14	28 / 100	3067 ms	1008 KiB

election

#include "bits/stdc++.h"
using namespace std;
// Hi 

int main(){
    ios::sync_with_stdio(0);cin.tie(0);
    int n;
    cin>>n;
    string s;
    cin>>s;
    int q;
    cin>>q;
    while(q--){
        int l,r;
        cin>>l>>r;
        l--,r--;
        vector<bool> vis(n+1,0);
        int cnt = 0;
        int ans = 0;
        for(int i=l;i<=r;i++){
            cnt += (s[i] == 'C' ? 1 : -1);
            //cout << i<<" "<<cnt<< '\n';
            if(cnt < 0){
                vis[i] = 1;
                cnt++;
                ans++;
            }
        }
        cnt = 0;
        for(int i=r;i>=l;i--){
            if(vis[i])continue;
            cnt += (s[i] == 'C' ? 1 : -1);
            //cout << i<<" "<<cnt<< '\n';
            if(cnt < 0){
                cnt++;
                ans++;
            }
        }
        cout << ans << '\n';
    }
    return 0;
}

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