oj.uz

Submission #776431

# Submission time Handle Problem Language Result Execution time Memory
776431 2023-07-07T21:26:25 Z Dzadzo Election (BOI18_election) C++14
100 / 100
 584 ms 47728 KB 
#include <bits/stdc++.h>
#define ll long long
#define int ll
#define pb push_back
#define S second
#define F first
#define pii pair<int,int>
#define vi vector <int>
#define vvi vector <vector<int>>
#define INF LLONG_MAX
#define MOD 1000000007
#define MAXN 500000
using namespace std;
struct node{
	int L,R,S,A;
};
node t[4*MAXN+1];
node merge(node a,node b){
	node res;
	res.L=max(a.L,a.S+b.L);
	res.R=max(b.R,b.S+a.R);
	res.S=a.S+b.S;
	res.A=max({a.A+b.S,a.S+b.A,a.L+b.R});
	return res;
}
void build(int a[],int v,int tl,int tr){
	if (tl==tr){
		if (a[tl]==1)t[v]={1,1,1,1}; else t[v]={0,0,-1,0};
	}else{
		int tm=(tl+tr)/2;
		build(a,v*2,tl,tm);
		build(a,v*2+1,tm+1,tr);
		t[v]=merge(t[v*2],t[v*2+1]);
	}
}
node query(int v,int tl,int tr,int l,int r){
	if (l>r)return {0,0,0,0};
	if (tl==l && tr==r)return t[v];
	int tm=(tl+tr)/2;
	return merge(query(v*2,tl,tm,l,min(r,tm)),query(v*2+1,tm+1,tr,max(l,tm+1),r));
}
int32_t main() {
	ios_base::sync_with_stdio(0),cin.tie(NULL),cout.tie(NULL);
	int n;
	cin>>n;
	int a[n+1];
	for (int i=1;i<=n;i++){
		char c;
		cin>>c;
		if (c=='T')a[i]=1; else a[i]=-1;
	}
	build(a,1,1,n);
	int q;
	cin>>q;
	while (q--){
		int l,r;
		cin>>l>>r;
		cout<<query(1,1,n,l,r).A<<"\n";
	}	
}

Subtask #1
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 468 KB Output is correct
2 Correct 2 ms 468 KB Output is correct
3 Correct 2 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 2 ms 468 KB Output is correct

Subtask #2
54.0 / 54.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 468 KB Output is correct
2 Correct 2 ms 468 KB Output is correct
3 Correct 2 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 2 ms 468 KB Output is correct
6 Correct 57 ms 10236 KB Output is correct
7 Correct 49 ms 10188 KB Output is correct
8 Correct 49 ms 10188 KB Output is correct
9 Correct 43 ms 10188 KB Output is correct
10 Correct 50 ms 10096 KB Output is correct
11 Correct 52 ms 10312 KB Output is correct
12 Correct 50 ms 10280 KB Output is correct
13 Correct 50 ms 10340 KB Output is correct
14 Correct 51 ms 10228 KB Output is correct
15 Correct 53 ms 10156 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 468 KB Output is correct
2 Correct 2 ms 468 KB Output is correct
3 Correct 2 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 2 ms 468 KB Output is correct
6 Correct 57 ms 10236 KB Output is correct
7 Correct 49 ms 10188 KB Output is correct
8 Correct 49 ms 10188 KB Output is correct
9 Correct 43 ms 10188 KB Output is correct
10 Correct 50 ms 10096 KB Output is correct
11 Correct 52 ms 10312 KB Output is correct
12 Correct 50 ms 10280 KB Output is correct
13 Correct 50 ms 10340 KB Output is correct
14 Correct 51 ms 10228 KB Output is correct
15 Correct 53 ms 10156 KB Output is correct
16 Correct 508 ms 46668 KB Output is correct
17 Correct 440 ms 46272 KB Output is correct
18 Correct 443 ms 46524 KB Output is correct
19 Correct 382 ms 45956 KB Output is correct
20 Correct 511 ms 45896 KB Output is correct
21 Correct 568 ms 47548 KB Output is correct
22 Correct 517 ms 47380 KB Output is correct
23 Correct 584 ms 47728 KB Output is correct
24 Correct 510 ms 47304 KB Output is correct
25 Correct 496 ms 46804 KB Output is correct