Bzoj 1342: [Baltic2007]sound mute problem [monotone queue]

1342: [Baltic2007]sound Mute issue time limit:5 Sec Memory limit:162 MB
submit:835 solved:372
[Submit] [Status] [Discuss] Description Mute problem in digital recording, the sound is described by a sequence of numbers that represent air pressure, each of which is called a sample, and the interval between each sample is a certain amount of time. Many sound processing tasks require that the recorded sound be divided into a few non-silent segments separated by silence. To avoid dividing into too many or too few non-silent segments, muting is usually defined as: M-sampled sequences, where the difference between the maximum and minimum values sampled in the sequence does not exceed a specific threshold of C. Please write a program to detect the Silence in N samples. The first line of input has three integers n,m,c (1<= n<=1000000,1<=m<=10000, 0<=c<=10000), respectively, representing the total number of samples, the length of the mute, and the maximum allowable noise level in silence. The 2nd row n integer ai (0 <= ai <= 1,000,000) represents each sampled value of the sound, separated by a space between every two integers. Output lists all mute start positions I (I meet Max (A[i, ..., i+m−1]) −min (a[i, ..., i+m−1]) <= c), each line represents the starting position of a mute, in the order in which it appears. If there is no mute, the output is none. Sample Input7 2 0
0 1 1 2 3 2 2
Sample Output2
6 Naked Questionno need to flip the sequence

#include <iostream>#include<cstdio>#include<cstring>#include<algorithm>#include<cmath>using namespacestd;Const intn=1e6+5; typedefLong LongLl;inlineintRead () {CharC=getchar ();intx=0, f=1;  while(c<'0'|| C>'9'){if(c=='-') f=-1; c=GetChar ();}  while(c>='0'&&c<='9') {x=x*Ten+c-'0'; c=GetChar ();} returnx*F;}intN,m,c,a[n],flag;intq1[n],h1,t1,q2[n],h2,t2;intMain () {//freopen ("In.txt", "R", stdin);N=read (); M=read (); c=read (); H1=h2=1; t1=t2=0;  for(intI=1; i<=n;i++) {A[i]=read ();  while(h1<=t1&&i-q1[h1]+1&GT;M) h1++;  while(h2<=t2&&i-q2[h2]+1&GT;M) h2++;  while(H1<=t1&&a[q1[t1]]<=a[i]) t1--; q1[++t1]=i;  while(H2<=t2&&a[q2[t2]]>=a[i]) t2--; q2[++t2]=i; if(i-m+1>=1&AMP;&AMP;A[Q1[H1]]-A[Q2[H2]]&LT;=C) printf ("%d\n", i-m+1), flag=1; }    if(!flag) puts ("NONE");}

Bzoj 1342: [Baltic2007]sound mute problem [monotone queue]