oj.uz

Submission #574082

# Submission time Handle Problem Language Result Execution time Memory
574082 2022-06-07T18:24:00 Z MohammadAghil K blocks (IZhO14_blocks) C++14
0 / 100
 1 ms 768 KB 
      #include <bits/stdc++.h>
//   #pragma GCC optimize ("Ofast,unroll-loops")
// #pragma GCC target ("avx2")
    using namespace std;
  typedef long long ll;
   typedef pair<int, int> pp;
    #define er(args ...) cerr << __LINE__ << ": ", err(new istringstream(string(#args)), args), cerr << endl
      #define per(i,r,l) for(int i = (r); i >= (l); i--)
        #define rep(i,l,r) for(int i = (l); i < (r); i++)
           #define all(x) x.begin(), x.end()
              #define sz(x) (int)(x).size()
                  #define pb push_back
                      #define ss second
                           #define ff first
                                   void err(istringstream *iss){}template<typename T,typename ...Args> void err(istringstream *iss,const T &_val, const Args&...args){string _name;*iss>>_name;if(_name.back()==',')_name.pop_back();cerr<<_name<<" = "<<_val<<", ",err(iss,args...);}
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const ll mod = 1e9 + 7, maxn = 1e5 + 1, maxk = 101, lg = 21, inf = ll(1e9) + 5;
ll pw(ll a,ll b,ll md=mod){if(!b)return 1;ll k=pw(a,b>>1ll);return k*k%md*(b&1ll?a:1)%md;}

int dp[maxn], nw[maxn], a[maxn][lg], lgg[maxn];

int get(int l, int r){
     int g = lgg[r-l+1];
     return max(a[l][g], a[r-(1<<g)+1][g]);
}

void slv(int l, int r, int lx, int rx){
     if(l > r) return;
     int mid = (l + r)>>1;
     int cr = get(min(rx,mid), mid);
     pp sl = {inf, -1};
     per(i,min(rx,mid),lx) sl = min(sl, {dp[i-1] + get(i, mid), i});
     nw[mid] = sl.ff;
     slv(l, mid-1, lx, sl.ss);
     slv(mid+1, r, sl.ss, rx);
}

int main(){
     cin.tie(0) -> sync_with_stdio(0); 
     rep(i,2,maxn) lgg[i] = lgg[i>>1] + 1;
     int n, k; cin >> n >> k;
     rep(i,0,n) cin >> a[i][0];
     rep(j,1,lg) rep(i,0,n-(1<<j)+1) a[i][j] = max(a[i][j-1], a[i+(1<<(j-1))][j-1]);
     rep(i,0,n) dp[i] = max(i?dp[i-1]:0, a[i][0]);
     rep(i,2,k+1){
          slv(i-1, n-1, i-1, n-1);
          rep(j,0,i-1) dp[j] = inf; 
          rep(j,i-1,n) dp[j] = nw[j];
     }
     cout << dp[n-1] << '\n';
     return 0; 
}

Compilation message

blocks.cpp: In function 'void slv(int, int, int, int)':
blocks.cpp:30:10: warning: unused variable 'cr' [-Wunused-variable]
   30 |      int cr = get(min(rx,mid), mid);
      |          ^~

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 724 KB Output is correct
2 Correct 1 ms 724 KB Output is correct
3 Correct 1 ms 724 KB Output is correct
4 Correct 1 ms 724 KB Output is correct
5 Correct 1 ms 724 KB Output is correct
6 Correct 1 ms 724 KB Output is correct
7 Correct 1 ms 724 KB Output is correct
8 Correct 1 ms 724 KB Output is correct
9 Correct 1 ms 724 KB Output is correct
10 Correct 1 ms 768 KB Output is correct
11 Incorrect 1 ms 724 KB Output isn't correct
12 Halted 0 ms 0 KB -

Subtask #2
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 724 KB Output is correct
2 Correct 1 ms 724 KB Output is correct
3 Correct 1 ms 724 KB Output is correct
4 Correct 1 ms 724 KB Output is correct
5 Correct 1 ms 724 KB Output is correct
6 Correct 1 ms 724 KB Output is correct
7 Correct 1 ms 724 KB Output is correct
8 Correct 1 ms 724 KB Output is correct
9 Correct 1 ms 724 KB Output is correct
10 Correct 0 ms 724 KB Output is correct
11 Incorrect 1 ms 724 KB Output isn't correct
12 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 724 KB Output is correct
2 Correct 1 ms 724 KB Output is correct
3 Correct 1 ms 724 KB Output is correct
4 Correct 1 ms 724 KB Output is correct
5 Correct 1 ms 724 KB Output is correct
6 Correct 1 ms 724 KB Output is correct
7 Correct 1 ms 724 KB Output is correct
8 Correct 1 ms 724 KB Output is correct
9 Correct 1 ms 724 KB Output is correct
10 Correct 1 ms 768 KB Output is correct
11 Incorrect 1 ms 724 KB Output isn't correct
12 Halted 0 ms 0 KB -

Subtask #4
0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 724 KB Output is correct
2 Correct 1 ms 724 KB Output is correct
3 Correct 1 ms 724 KB Output is correct
4 Correct 1 ms 724 KB Output is correct
5 Correct 1 ms 724 KB Output is correct
6 Correct 1 ms 724 KB Output is correct
7 Correct 1 ms 724 KB Output is correct
8 Correct 1 ms 724 KB Output is correct
9 Correct 1 ms 724 KB Output is correct
10 Correct 1 ms 768 KB Output is correct
11 Incorrect 1 ms 724 KB Output isn't correct
12 Halted 0 ms 0 KB -