Submission #124071

#	Time	Username	Problem	Language	Result	Execution time	Memory
124071		mechfrog88	Safety (NOI18_safety)	C++14	24 / 100	892 ms	262148 KiB

safety

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#pragma GCC optimize("unroll-loops,no-stack-protector")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
 
using namespace __gnu_pbds;
using namespace std;
 
template <typename T>
using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
 
typedef long long ll;
typedef long double ld;	

vector <vector<ll>> sparse(15,vector<ll>(5001));

void build(vector <ll> arr){
	for (ll z=0;z<15;z++){
		for (ll x=0;x<5001;x++){
			sparse[z][x] = LLONG_MAX;
			if (x + (1 << z) - 1 < 5000){
				if (z == 0) sparse[z][x] = arr[x];
				else sparse[z][x] = min(sparse[z-1][x],sparse[z-1][x+(1<<(z-1))]);
			} 
		}
	}
}

ll query (ll l ,ll r){
	int k = 31-__builtin_clz(r-l);
	if (l == r) k = 0;
	return min(sparse[k][l],sparse[k][r - (1 << k)+1]);
}

int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	ll n,d;
	cin >> n >> d;
	vector <vector<ll>> dp(n+1,vector<ll>(5001,0));
	vector <ll> arr(n+1);
	ll maxi = 0;
	for (int z=1;z<=n;z++){
		cin >> arr[z];
		maxi = max(maxi,arr[z]);
	}
	for (int z=1;z<=n;z++){
		build(dp[z-1]);
		for (int h=0;h<=maxi;h++){
			ll temp = query(max(ll(0),h-d),min(ll(maxi),h+d));
			dp[z][h] = temp+abs(arr[z]-h);
		}
	}
	ll mini = LLONG_MAX;
	for(int z=0;z<=maxi;z++){
		mini = min(dp[n][z],mini);
	}
	cout << mini << endl;
}

• Subtask 1: 3 / 3
• Subtask 2: 4 / 4
• Subtask 3: 0 / 9
• Subtask 4: 0 / 5
• Subtask 5: 6 / 6
• Subtask 6: 11 / 11
• Subtask 7: 0 / 11
• Subtask 8: 0 / 22
• Subtask 9: 0 / 29