oj.uz

Submission #1085191

# Submission time Handle Problem Language Result Execution time Memory
1085191 2024-09-07T16:43:19 Z elotelo966 Election (BOI18_election) C++17
82 / 100
 495 ms 47376 KB 
#include <bits/stdc++.h>
using namespace std;
 
#define int long long
#define OYY LLONG_MAX
#define mod 998244353
#define faster ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
#define FOR for(int i=1;i<=n;i++)
#define mid (start+end)/2
#define lim 500005
#define fi first
#define se second

array<int,4> bos;

int arr[lim];

int sum[4*lim],ans[4*lim],le[4*lim],ri[4*lim];

inline void build(int node,int start,int end){
	if(start==end){
		sum[node]=le[node]=ri[node]=ans[node]=arr[start];
		ans[node]=max(ans[node],0ll);
		return ;
	}
	build(node*2,start,mid),build(node*2+1,mid+1,end);
	sum[node]=sum[node*2]+sum[node*2+1];
	le[node]=max({le[node*2],sum[node*2]+le[node*2+1],0ll});
	ri[node]=max({ri[node*2+1],sum[node*2+1]+ri[node*2],0ll});
	ans[node]=max({ans[node*2]+sum[node*2+1],ans[node*2+1]+sum[node*2],le[node*2]+ri[node*2+1],0ll});
}

inline array<int,4> query(int node,int start,int end,int l,int r){
	if(start>end || start>r || end<l)return bos;
	if(start>=l && end<=r){
		array<int,4> tut;
		tut[0]=sum[node];
		tut[1]=le[node];
		tut[2]=ri[node];
		tut[3]=ans[node];
		return tut;
	}
	array<int,4> tut;
	array<int,4> left=query(node*2,start,mid,l,r);
	array<int,4> right=query(node*2+1,mid+1,end,l,r);
	tut[0]=left[0]+right[0];
	tut[1]=max({left[1],left[0]+right[1],0ll});
	tut[2]=max({right[2],right[0]+left[2],0ll});
	tut[3]=max({left[3]+right[0],right[3]+left[0],left[1]+right[2],0ll});
	return tut;
}

inline void debug(int node,int start,int end){
	cout<<node<<" "<<start<<" "<<end<<" "<<sum[node]<<" "<<le[node]<<" "<<ri[node]<<" "<<ans[node]<<endl;
	if(start==end)return ;
	debug(node*2,start,mid),debug(node*2+1,mid+1,end);
}

int32_t main(){
	faster
	int n;cin>>n;
	string s;cin>>s;
	FOR{
		if(s[i-1]=='C')arr[i]=-1;
		else arr[i]=1;
	}
	
	build(1,1,n);
	
	//debug(1,1,n);
	
	int q;cin>>q;
	while(q--){
		int x,y;cin>>x>>y;
		array<int,4> tut=query(1,1,n,x,y);
		cout<<tut[3]<<'\n';
	}
	
	return 0;
}

Subtask #1
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 600 KB Output is correct
2 Correct 1 ms 672 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 1 ms 604 KB Output is correct

Subtask #2
54.0 / 54.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 600 KB Output is correct
2 Correct 1 ms 672 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 53 ms 10576 KB Output is correct
7 Correct 50 ms 10576 KB Output is correct
8 Correct 52 ms 10320 KB Output is correct
9 Correct 43 ms 10340 KB Output is correct
10 Correct 53 ms 10472 KB Output is correct
11 Correct 55 ms 10576 KB Output is correct
12 Correct 57 ms 10580 KB Output is correct
13 Correct 53 ms 10580 KB Output is correct
14 Correct 58 ms 10576 KB Output is correct
15 Correct 59 ms 10576 KB Output is correct

Subtask #3
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 600 KB Output is correct
2 Correct 1 ms 672 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 53 ms 10576 KB Output is correct
7 Correct 50 ms 10576 KB Output is correct
8 Correct 52 ms 10320 KB Output is correct
9 Correct 43 ms 10340 KB Output is correct
10 Correct 53 ms 10472 KB Output is correct
11 Correct 55 ms 10576 KB Output is correct
12 Correct 57 ms 10580 KB Output is correct
13 Correct 53 ms 10580 KB Output is correct
14 Correct 58 ms 10576 KB Output is correct
15 Correct 59 ms 10576 KB Output is correct
16 Correct 494 ms 47328 KB Output is correct
17 Correct 411 ms 47160 KB Output is correct
18 Correct 454 ms 47376 KB Output is correct
19 Correct 382 ms 46824 KB Output is correct
20 Incorrect 495 ms 46564 KB Output isn't correct
21 Halted 0 ms 0 KB -