Submission #427301

#	Time	Username	Problem	Language	Result	Execution time	Memory
427301		farhan132	Group Photo (JOI21_ho_t3)	C++17	100 / 100	4529 ms	840 KiB

Main

/***Farhan132***/
//#pragma GCC optimize("Ofast")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,fma")
//#pragma GCC optimization ("unroll-loops")
#include <bits/stdc++.h>



using namespace std;
 
typedef long long ll;
typedef unsigned long long ull;
typedef double dd;
typedef vector<ll> vll;
typedef pair<ll , ll> ii;
typedef vector< ii > vii;
typedef pair < pair < ll , ll > , pair < ll , ll > > cm; 
 
#define ff first
#define ss second
#define pb push_back
#define in insert
#define f0(b) for(int i=0;i<(b);i++)
#define f00(b) for(int j=0;j<(b);j++)
#define f1(b) for(int i=1;i<=(b);i++)
#define f11(b) for(int j=1;j<=(b);j++)
#define f2(a,b) for(int i=(a);i<=(b);i++)
#define f22(a,b) for(int j=(a);j<=(b);j++)
#define sf(a) scanf("%lld",&a)
#define sff(a,b) scanf("%lld %lld", &a , &b)
#define pf(a) printf("%lld\n",a)
#define pff(a,b) printf("%lld %lld\n", a , b)
#define PI 3.14159265359
#define bug printf("**!\n")
#define mem(a , b) memset(a, b ,sizeof(a))
#define front_zero(n) __builtin_clzll(n)
#define back_zero(n) __builtin_ctzll(n)
#define total_one(n) __builtin_popcountll(n)
#define clean fflush(stdout)

const ll mod =  (ll) 998244353;
const ll maxn = (ll)2e5 + 5;
const int nnn = 1048590;
const int inf = numeric_limits<int>::max()-1;
//const ll INF = numeric_limits<ll>::max()-1;
const ll INF = 1e18;
 
ll dx[]={0,1,0,-1};
ll dy[]={1,0,-1,0};
ll dxx[]={0,1,0,-1,1,1,-1,-1};
ll dyy[]={1,0,-1,0,1,-1,1,-1};

bool USACO = 0;

mt19937 rng(chrono::system_clock::now().time_since_epoch().count());

#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
  
#define ordered_set tree<ll, null_type,less<ll >, rb_tree_tag,tree_order_statistics_node_update>

const ll N = 5005;

ll dp[N] , a[N] , p[N];

void solve(){

   dp[0] = 0;
   ll n;
   cin >> n;
   for(ll i = 1; i <= n; i++) cin >> a[i] , dp[i] = INF;

   for(ll i = 1; i <= n; i++){
    vector < ll > v;
    for(ll j = 1; j <= n; j++){
      if(a[j] >= i) p[a[j]] = v.size() , v.pb(a[j]);
    }
    ordered_set s;
    ll ans = dp[i - 1]; 
    for(ll j = i; j <= n; j++){
      s.in(p[j]);
      ll sz = s.size();
      sz = sz - (s.order_of_key(p[j])) - 1;
      ans += p[j] - sz;
      dp[j] = min(dp[j] , ans);
    }
   }
   cout << dp[n];

   return;
}

 
int main() {
    
    
    #ifdef LOCAL
        freopen("in", "r", stdin);
        freopen("out", "w", stdout);
    #else 
      if(USACO){
        freopen("balancing.in", "r", stdin);
        freopen("balancing.out", "w", stdout);
      }else{
       ios_base::sync_with_stdio(0); cin.tie(NULL); cout.tie(NULL);
      }
    #endif
    ll T = 1;
    //cin >> T;
    ll CT = 0;
    while(T--){
      //  cout << "Case #" << ++CT <<": " ;
        solve();
    }
 
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:111:8: warning: unused variable 'CT' [-Wunused-variable]
  111 |     ll CT = 0;
      |        ^~
Main.cpp:103:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  103 |         freopen("balancing.in", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:104:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  104 |         freopen("balancing.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 7 / 7
• Subtask 3: 32 / 32
• Subtask 4: 20 / 20
• Subtask 5: 36 / 36