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Time Limit: 1500/1000 MS (Java/Others) Memory Limit: 131072/131072 K (Java/Others)
Total Submission(s): 153 Accepted Submission(s): 123
区间最值问题 rmq和线段树都可以解决
/* *********************************************** Author :pk28 Created Time :2015/9/13 19:47:01 File Name :4.cpp ************************************************ */ #include <iostream> #include <cstring> #include <cstdlib> #include <stdio.h> #include <algorithm> #include <vector> #include <queue> #include <set> #include <map> #include <string> #include <math.h> #include <stdlib.h> #include <iomanip> #include <list> #include <deque> #include <stack> #define ull unsigned long long #define ll long long #define mod 90001 #define INF 0x3f3f3f3f #define maxn 1000+10 #define cle(a) memset(a,0,sizeof(a)) const ull inf = 1LL << 61; const double eps=1e-5; using namespace std; bool cmp(int a,int b){ return a>b; } int t,n,m; int a[1100]; int dp[maxn][20]; void rmq_init(){ //cle(dp); for(int i=0;i<n;i++) dp[i][0]=a[i]; for(int j=1;(1<<j)<=n;j++) for(int i=0;i+(1<<j)-1<n;i++){ dp[i][j]=max(dp[i][j-1],dp[i+(1<<(j-1))][j-1]); } } int rmq(int l,int r){ int k=0; while(1<<(k+1)<=r+1-l)k++; return max(dp[l][k],dp[r-(1<<k)+1][k]); } int main() { #ifndef ONLINE_JUDGE //freopen("in.txt","r",stdin); #endif //freopen("out.txt","w",stdout); cin>>t; while(t--){ int b; scanf("%d",&n); for(int i=0;i<n;i++){ scanf("%d",&a[i]); } rmq_init(); int l,r; scanf("%d",&m); for(int i=1;i<=m;i++){ scanf("%d %d",&l,&r); printf("%d\n",rmq(l-1,r-1)); } } return 0; }
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原文地址:http://www.cnblogs.com/pk28/p/4805483.html