Submission #716154

#	Time	Username	Problem	Language	Result	Execution time	Memory
716154		ktkerem	K blocks (IZhO14_blocks)	C++17	0 / 100	1 ms	340 KiB

blocks

/*#pragma GCC target ("avx2")
#pragma GCC optimize ("O3")
#pragma GCC optimize("Ofast")
#pragma GCC optimize ("unroll-loops")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")/**/
#include<bits/stdc++.h>
typedef long long ll;
typedef long double ld;
typedef __int128 vll;
typedef long long ftyp;
typedef std::complex<ftyp> vec;
#define llll std::pair<ll , ll>
#define pb push_back
#define fi first
#define sec second
#define cx real
#define cy imag
#define all(a) a.begin() , a.end()
#define debug std::cout << "!!ALERT ALERT!!" << std::endl;
const ll limit = 1e15+7;
const ll sus = 1e5+5;
std::mt19937 rng(std::chrono::steady_clock::now().time_since_epoch().count());
ll n , m;std::vector<ll> ar;
ll dp[105][sus];
void solve(){
  std::cin >> n >> m;
  ar.resize(n+5);
  dp[1][0] = limit;
  for(ll i = 1;n>=i;i++){
    std::cin >> ar[i];
  }
  dp[1][1] = ar[1];
  for(ll i = 2;n>=i;i++){
    dp[1][i] = std::max(dp[1][i-1] , ar[i]);
  }
  for(ll k = 2;m>=k;k++){
    std::stack<ll> s1 , s2;
    for(ll j = 1;n>=j;j++){
      ll ff = dp[k-1][j-1];
      while(!s1.empty() && s1.top() < ar[j]){
        ff = std::min(ff , s2.top());
        s1.pop();
        s2.pop();
      }
      if(s1.empty() || ff + ar[j] < s1.top() + s2.top()){
        s1.push(ar[j]);
        s2.push(ff);
      }
      if(j >= k){
        dp[k][j] = s1.top() + s2.top();
      }
    }
  }
  std::cout << dp[m][n];
  return;/**/
}
int main(){
  std::ios_base::sync_with_stdio(false);std::cin.tie(NULL);
  ll t = 1;
  //std::cin >> t;
  while(t--){
    solve();
  }
}

Compilation message (stderr)

blocks.cpp:5:78: warning: "/*" within comment [-Wcomment]
    5 | #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")/**/
      |

• Subtask 1: 0 / 14
• Subtask 2: 0 / 18
• Subtask 3: 0 / 21
• Subtask 4: 0 / 47