oj.uz

Submission #679792

# Submission time Handle Problem Language Result Execution time Memory
679792 2023-01-09T08:32:56 Z amir Sjeckanje (COCI21_sjeckanje) C++17
55 / 110
 2000 ms 5136 KB 
/*
<< in the name of Allah >>
*/

#include <bits/stdc++.h>

using namespace std;

typedef long long ll ;
typedef pair<int , int> pii ;
typedef pair<ll , ll> pll ;
#define ps push_back
#define pb pop_back
#define mp make_pair
#define all(x) x.begin() , x.end() 
#define sz(x) (int)x.size() 
#define debug(a) cout<<"debug: "<<(#a)<<" = "<<a<<'\n'
#define debugAr(a) cout << "Array " << (#a) << " :\n" ;for (int TMP : a) cout << TMP << " " ; cout << '\n' ;
const int maxn = 2e5 + 3 ;
ll dp[maxn] ;
ll a[maxn] ;
ll ghol[maxn] ;
ll n , q ;

ll Abs(ll x){
	if (x < 0) x = 0-x ;
	return x ;
}

void solve(){
	fill(ghol , ghol+n+2 , 0 ) ;
	for (int i = n ;i > 1 ; i--){
		if (a[i-1] <= a[i]){
			int j = i-1 ;
			while (a[j] <= a[j+1] && j > 0){
				ghol[j] = i ;
				j-- ;
			}
			i = j+2 ;
		}
		else{
			int j = i-1 ;
			while (a[j] > a[j+1] && j > 0){
				ghol[j] = i ;
				j-- ;
			}
			i = j+2 ;
		}
	}
	for (int i = n-1 ; i > 0 ;i--){
		ll x = Abs(a[ghol[i]] - a[i]) ;
		dp[i] = max(dp[i+1] , (x+dp[ghol[i]+1])) ;
		if (ghol[i] > i){
			x = Abs(a[ghol[i]-1] -a[i]) ;
			dp[i] = max(dp[i] , x+dp[ghol[i]]) ;
		}
	}
	cout << dp[1] << '\n' ;
}


int main()
{
    ios::sync_with_stdio(false) ; 
	cin.tie(NULL) ;
	cout.tie(NULL) ;
	cin>> n >> q ;
	for (int i = 1;i <= n ; i++) cin >> a[i] ;
	while (q--){
		ll l , r , tt ;
		cin >> l >> r >> tt ;
		for (int i = l ; i <= r ; i++) a[i] += tt ;
		solve() ;
	}
	
	
}

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 340 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 63 ms 416 KB Output is correct
8 Correct 64 ms 540 KB Output is correct
9 Correct 65 ms 420 KB Output is correct
10 Correct 64 ms 432 KB Output is correct
11 Correct 66 ms 416 KB Output is correct
12 Correct 61 ms 412 KB Output is correct

Subtask #3
0 / 55.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 63 ms 416 KB Output is correct
8 Correct 64 ms 540 KB Output is correct
9 Correct 65 ms 420 KB Output is correct
10 Correct 64 ms 432 KB Output is correct
11 Correct 66 ms 416 KB Output is correct
12 Correct 61 ms 412 KB Output is correct
13 Execution timed out 2053 ms 5136 KB Time limit exceeded
14 Halted 0 ms 0 KB -