Submission #1018321

#	Time	Username	Problem	Language	Result	Execution time	Memory
1018321		YassirSalama	Election (BOI18_election)	C++17	0 / 100	4 ms	348 KiB

election

#include<bits/stdc++.h>
using namespace std;
#define int long long
signed main(){
    int n;
    cin>>n;
    string s;
    cin>>s;
    int arr[n];
    for(int i=0;i<n;i++){
        arr[i]=(s[i]=='C'?1:-1);
    }
    int pref[n];
    int suff[n];
    for(int i=0;i<n;i++){
        pref[i]=arr[i];
        if(i)
        pref[i]+=pref[i-1];
    }
    for(int j=n-1;j>=0;j--){
        suff[j]=arr[j];
        if(j+1<n) suff[j]+=suff[j+1];
    }
    int q;
    cin>>q;
    while(q--){
        int ans=0;
        int l,r;
        cin>>l>>r;
        l--,r--;
        int c=1e18;
        int d=1e18;
        for(int i=l;i<=r;i++){
            c=min(c,pref[i]);
        }
        for(int i=l;i<=r;i++){
            d=min(d,suff[i]);
        }
        if(l){
            c-=pref[l-1];
        }
        if(r+1<n)
            d-=suff[r+1];
        int x=max(-c,-d);
        ans=max(ans,x);
        cout<<ans<<endl;
    }
}

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