제출 #805441

#제출 시각아이디문제언어결과실행 시간메모리
805441QwertyPi코끼리 (Dancing Elephants) (IOI11_elephants)C++14
26 / 100
12 ms1928 KiB
#include "elephants.h" #include <bits/stdc++.h> const int MAXN = 1.5e5 + 11; const int SQ = 400; int n, l; int x[MAXN]; struct naive{ int n, y[SQ * 2], dp[SQ * 2], fin[SQ * 2]; void build(int n, int x[]){ naive::n = n; for(int i = 0; i < n; i++){ y[i] = x[i]; } } void rem(int x){ int i; for(i = 0; i < n; i++) if(y[i] == x) break; for(int j = i; j < n - 1; j++) y[j] = y[j + 1]; n--; precalc(); } void add(int x){ int i; for(i = 0; i < n; i++) if(y[i] > x) break; for(int j = n - 1; j >= i; j--) y[j + 1] = y[j]; y[i] = x; n++; precalc(); } void precalc(){ dp[n] = 0; fin[n] = n; int r = n - 1; for(int j = n - 1; j >= 0; j--){ while(y[r] - y[j] > l) r--; dp[j] = dp[r + 1] + 1; fin[j] = r + 1 != n ? fin[r + 1] : j; } } int qry(){ return dp[0]; } } cal[MAXN / SQ + 10]; void rebuild(){ std::sort(x, x + n); cal[0].build(n, x); } void rem(int x){ cal[0].rem(x); } void add(int x){ cal[0].add(x); } int qry(){ return cal[0].qry(); } void init(int N, int L, int X[]){ n = N; l = L; for(int i = 0; i < n; i++) x[i] = X[i]; rebuild(); } int update(int i, int y){ rem(x[i]); x[i] = y; add(x[i]); return qry(); }
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