oj.uz

Submission #648764

# Submission time Handle Problem Language Result Execution time Memory
648764 2022-10-08T06:51:28 Z I_am_balancing Safety (NOI18_safety) C++17
5 / 100
 119 ms 262144 KB 
#include<bits/stdc++.h>
using namespace std;
using ll = long long;
using pl = pair<ll,ll>;
using tl = tuple<ll,ll,ll>;
using ld = long double;
#define all(x) (x).begin(),(x).end()
#define sz(x) ll((x).size())
#define pb emplace_back
#define F first
#define S second
const ll
  inf = (1ll<<62)
, N   = 2e5 + 1
, K   = 340
, mod = 1e9 + 7
;
ll n, h;
array<ll,N> a;

void solve1(){
    ll l = 0, r = 1e9+1;
    auto check = [&](ll mid){
        ll t = 0;
        for(ll i = 1;i<=n;i++)t+=abs(a[i]-mid);
        return t;
    };
    while(l+3<r){
        ll mid1 = l + (r-l)/3, mid2 = r - (r-l)/3;
        if(check(mid1) > check(mid2))l=mid1;
        else r = mid2;
    }
    ll ans = inf;
    for(ll i = l;i<=r;i++)ans=min(ans,check(i));
    cout << ans;
}

void solve2(){
    vector<vector<ll>> dp(6000,vector<ll>(6000,inf));
    fill(all(dp[0]),0);
    for(ll i = 1;i<=n;i++){
        multiset<ll> st;
        for(ll j = 0;j<=h;j++)st.insert(dp[i-1][j]);
        for(ll j = 0;j<=5000;j++){
            dp[i][j] = *st.begin() + abs(a[i] - j);
            if(j>=h)st.erase(st.find(dp[i-1][j-h]));
            if(j+h+1<=5000)st.insert(dp[i-1][j+h+1]);
        }
    }
    cout << *min_element(all(dp[n]));
}

void solve(){
    cin >> n >> h;
    for(ll i = 1;i<=n;i++){
        cin >> a[i];
    }
    if(h == 0){
        solve1();
    }
    else if(n<=5000 && *max_element(all(a))<=5000){
        solve2();
    }
}


void precalc(){}

int main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    ll t = 1;
    precalc();
    //cout << fixed << setprecision(10);
    //cin >> t;
    while(t--){
        solve();
    }
}

Subtask #1
0 / 3.0

# Verdict Execution time Memory Grader output
1 Runtime error 119 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #2
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Runtime error 102 ms 262144 KB Execution killed with signal 9
3 Halted 0 ms 0 KB -

Subtask #3
0 / 9.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 1336 KB Output is correct
2 Correct 33 ms 1748 KB Output is correct
3 Correct 38 ms 1748 KB Output is correct

Subtask #5
0 / 6.0

# Verdict Execution time Memory Grader output
1 Runtime error 119 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# Verdict Execution time Memory Grader output
1 Runtime error 119 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #7
0 / 11.0

# Verdict Execution time Memory Grader output
1 Runtime error 119 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #8
0 / 22.0

# Verdict Execution time Memory Grader output
1 Runtime error 119 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #9
0 / 29.0

# Verdict Execution time Memory Grader output
1 Runtime error 119 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -