Submission #124121

#	Time	Username	Problem	Language	Result	Execution time	Memory
124121		mechfrog88	Safety (NOI18_safety)	C++14	24 / 100	2069 ms	196656 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 <ll> a;
vector <ll> s;

void build(ll id = 1, ll l = 0, ll r = a.size()){
	if (r - l < 2) {
		s[id] = a[l];
		return;
	}
	ll mid = (l+r)/2;
	build (id*2,l,mid);
	build (id*2+1,mid,r);
	s[id] = min(s[id*2],s[id*2+1]);
}

ll query(ll x,ll y,ll id = 1, ll l = 0, ll r = a.size()){
	if (y <= l || x >= r) return LLONG_MAX;
	if (x <= l && r <= y) return s[id];
	ll mid = (l+r)/2;
	return min(query(x,y,id*2,l,mid),query(x,y,id*2+1,mid,r));
}


int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	ll n,d;
	cin >> n >> d;
	vector <ll> arr(n+1);
	ll maxi = 0;
	for (int z=1;z<=n;z++){
		cin >> arr[z];
		maxi = max(maxi,arr[z]);
	}
	vector <vector<ll>> dp(n+1,vector<ll>(maxi+1,0));
	a.resize(maxi+1,0);
	for (int z=1;z<=n;z++){
		s.resize(a.size()*4);
		build();
		for (int h=0;h<=maxi;h++){
			ll temp = query(max(ll(0),h-d),min(maxi+1,h+d+1));
			dp[z][h] = temp+abs(arr[z]-h);
			a[h] = dp[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