BZOJ2216 [poi2011]lightning Conductor

Orz YDC: "This is the first non-slope optimized 1d1d I've seen ..."

Say YDC god Ben that the monotony queue is not optimized BAA? 、、、 've been kneeling.

Orz of decision Monotonicity

1 /**************************************************************2 problem:22163 User:rausen4 language:c++5 result:accepted6 time:4128 Ms7 memory:16432 KB8 ****************************************************************/9  Ten#include <cstdio> One#include <cmath> A#include <algorithm> -   - using namespacestd; thetypedefDoubleLF; - Const intN =500005; -   - structData { +     intL, R, p; - data () {} +Dataint_l,intArrint_p): L (_l), R (_r), p (_p) {} A }q[n]; at   - intN, A[n]; - LF F[n], g[n]; -   -InlineintRead () { -     intx =0, SGN =1; in     CharCH =GetChar (); -      while(Ch <'0'||'9'<ch) { to         if(ch = ='-') SGN =-1; +CH =GetChar (); -     } the      while('0'<= CH && Ch <='9') { *x = x *Ten+ CH-'0'; $CH =GetChar ();Panax Notoginseng     } -     returnSGN *x; the } +   AInline LF Calc (intJinti) { the     returnA[J]-a[i] + sqrt (ABS (i-j)); + } -   $ intFind (Data T,intx) { $     intL = t.l, r =T.R, mid; -      while(L <=r) { -MID = L + R >>1; the         if(Calc (T.P, mid) >Calc (x, mid)) -L = mid +1;Wuyi         ElseR = Mid-1; the     } -     returnl; Wu } -   About voidDP (LF *F) { $      for(inti =1, h =1, t =0, TMP; I <= N; ++i) { -++Q[H].L; -         if(H <= t && q[h].r < Q[H].L) + +h; -         if(H > T | | calc (i, N) >Calc (Q[T].P, N)) { A              while(H <= t && Calc (Q[T].P, Q[T].L) <Calc (i, Q[T].L)) +--T; the             if(H > t) q[++t] =data (i, n, i); -             Else { $TMP =find (Q[t], i); theQ[T].R = tmp-1; theQ[++T] =data (TMP, n, i); the             } the         } -F[i] =Calc (q[h].p, i); in     } the } the   About intMain () { the     inti; then =read (); the      for(i =1; I <= N; ++i) +A[i] =read (); - DP (f); theReverse (A +1, A + n +1);Bayi DP (g); the      for(i =1; I <= N; ++i) theprintf"%d\n", (int) Ceil (Max (F[i], g[n-i +1]))); -     return 0; - } the 

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BZOJ2216 [poi2011]lightning Conductor