#define PROBLEM "https://judge.yosupo.jp/problem/staticrmq" #include "../RMQ.hpp" #include "../../util/template.hpp" int main(){ lint n,q; cin>>n>>q; vector<lint>a(n); rep(i,n)cin>>a[i]; RMQ<lint> rmq(a); while(q--){ lint s,t; cin>>s>>t; cout<<rmq.query(s,t)<<endl; } }
#line 1 "data_structure/test/LC_RMQ.test.cpp" #define PROBLEM "https://judge.yosupo.jp/problem/staticrmq" #line 2 "data_structure/RMQ.hpp" #include<assert.h> #include<vector> #include<stack> #include<numeric> #include<cmath> #include<algorithm> #line 3 "data_structure/small_rmq.hpp" /** * RMQ(small) &lt;O(N),O(1)&gt;(N<=64) */ template<typename T> class small_rmq{ using u64=unsigned long long; std::vector<u64>table; std::vector<T> v; public: small_rmq(std::vector<T> v):v(v){ assert(v.size()<=64); std::vector<int>tmp(v.size()); table.resize(v.size(),0); std::stack<T>stk; for(int i=0;i<(int)v.size();++i){ tmp.resize(v.size()); while(!stk.empty()&&v[stk.top()]>=v[i]){ stk.pop(); } tmp[i]=stk.empty()?-1:stk.top(); stk.emplace(i); } for(int i=0;i<(int)v.size();++i){ if(tmp[i]!=-1)table[i]=table[tmp[i]]|(1ULL<<(tmp[i])); } } T query(int l,int r){ assert(l!=r); const u64 tmp=table[r-1]&~((1ULL<<l)-1); if(tmp==0)return r-1; else return __builtin_ctzll(tmp); } }; #line 3 "data_structure/sparse_table.hpp" #include<functional> #line 2 "alga/maybe.hpp" #include<cassert> /** * @brief Maybe * @see https://ja.wikipedia.org/wiki/%E3%83%A2%E3%83%8A%E3%83%89_(%E3%83%97%E3%83%AD%E3%82%B0%E3%83%A9%E3%83%9F%E3%83%B3%E3%82%B0)#Maybe%E3%83%A2%E3%83%8A%E3%83%89 */ template<typename T> struct maybe{ bool _is_none; T val; maybe():_is_none(true){} maybe(T val):_is_none(false),val(val){} T unwrap()const{ assert(!_is_none); return val; } T unwrap_or(T e)const{ return _is_none?e:val; } bool is_none()const{return _is_none;} bool is_some()const{return !_is_none;} }; template<typename T,typename F> auto expand(F op){ return [&op](const maybe<T>& s,const maybe<T>& t){ if(s.is_none())return t; if(t.is_none())return s; return maybe<T>(op(s.unwrap(),t.unwrap())); }; } #line 7 "data_structure/sparse_table.hpp" /** * @brief SparseTable */ template<typename T,typename F> class sparse_table{ F f; std::vector<std::vector<T>>data; public: sparse_table(std::vector<T> v,F f=F()):f(f){ int n=v.size(),log=log2(n)+1; data.resize(n,std::vector<T>(log)); for(int i=0;i<n;i++)data[i][0]=v[i]; for(int j=1;j<log;j++)for(int i=0;i+(1<<(j-1))<n;i++){ data[i][j]=f(data[i][j-1],data[i+(1<<(j-1))][j-1]); } } maybe<T> get(int l,int r){ if(l==r)return maybe<T>(); if(r<l)std::swap(l,r); int k=std::log2(r-l); return maybe<T>(f(data[l][k],data[r-(1<<k)][k])); } }; #line 3 "functional/MIN.hpp" /** * @brief 最小値 */ template<typename T> struct MIN{ T operator()(const T& s,const T& t){ return std::min(s,t); } }; #line 12 "data_structure/RMQ.hpp" /** * @brief RMQ&lt;O(N),O(1)&gt; * @see https://noshi91.hatenablog.com/entry/2018/08/16/125415 */ template<typename T> class RMQ{ constexpr static int b=64; std::vector<T>v; std::vector<small_rmq<T>*>backet; sparse_table<T,MIN<T>>* st=0; public: RMQ(std::vector<T>v):v(v){ std::vector<T>tmp2; for(int i=0;i<(int)v.size();i+=b){ std::vector<T>tmp; T mn=std::numeric_limits<T>::max(); for(int j=0;i+j<(int)v.size()&&j<b;j++){ tmp.push_back(v[i+j]); if(mn>v[i+j])mn=v[i+j]; } tmp2.push_back(mn); backet.push_back(new small_rmq<T>(tmp)); } st=new sparse_table<T,MIN<T>>(tmp2); } T query(int s,int t){ if(s/b==t/b)return v[s/b*b+backet[s/b]->query(s%b,t%b)]; T res=std::numeric_limits<T>::max(); res=std::min(res,v[s/b*b+backet[s/b]->query(s%b,b)]); res=std::min(res,st->get(s/b+1,t/b).unwrap_or(std::numeric_limits<T>::max())); if(t%b!=0)res=std::min(res,v[t/b*b+backet[t/b]->query(0,t%b)]); return res; } }; #line 2 "util/template.hpp" #pragma GCC optimize("Ofast") #pragma GCC optimize("unroll-loops") #pragma GCC target("avx2") #include<bits/stdc++.h> using namespace std; struct __INIT__{__INIT__(){cin.tie(0);ios::sync_with_stdio(false);cout<<fixed<<setprecision(15);}}__INIT__; typedef long long lint; #define INF (1LL<<60) #define IINF (1<<30) #define EPS (1e-10) #define endl ('\n') typedef vector<lint> vec; typedef vector<vector<lint>> mat; typedef vector<vector<vector<lint>>> mat3; typedef vector<string> svec; typedef vector<vector<string>> smat; template<typename T>using V=vector<T>; template<typename T>using VV=V<V<T>>; template<typename T>inline void output(T t){bool f=0;for(auto i:t){cout<<(f?" ":"")<<i;f=1;}cout<<endl;} template<typename T>inline void output2(T t){for(auto i:t)output(i);} template<typename T>inline void debug(T t){bool f=0;for(auto i:t){cerr<<(f?" ":"")<<i;f=1;}cerr<<endl;} template<typename T>inline void debug2(T t){for(auto i:t)output(i);} #define loop(n) for(long long _=0;_<(long long)(n);++_) #define _overload4(_1,_2,_3,_4,name,...) name #define __rep(i,a) repi(i,0,a,1) #define _rep(i,a,b) repi(i,a,b,1) #define repi(i,a,b,c) for(long long i=(long long)(a);i<(long long)(b);i+=c) #define rep(...) _overload4(__VA_ARGS__,repi,_rep,__rep)(__VA_ARGS__) #define _overload3_rev(_1,_2,_3,name,...) name #define _rep_rev(i,a) repi_rev(i,0,a) #define repi_rev(i,a,b) for(long long i=(long long)(b)-1;i>=(long long)(a);--i) #define rrep(...) _overload3_rev(__VA_ARGS__,repi_rev,_rep_rev)(__VA_ARGS__) // #define rep(i,...) for(auto i:range(__VA_ARGS__)) // #define rrep(i,...) for(auto i:reversed(range(__VA_ARGS__))) // #define repi(i,a,b) for(lint i=lint(a);i<(lint)(b);++i) // #define rrepi(i,a,b) for(lint i=lint(b)-1;i>=lint(a);--i) // #define irep(i) for(lint i=0;;++i) // inline vector<long long> range(long long n){if(n<=0)return vector<long long>();vector<long long>v(n);iota(v.begin(),v.end(),0LL);return v;} // inline vector<long long> range(long long a,long long b){if(b<=a)return vector<long long>();vector<long long>v(b-a);iota(v.begin(),v.end(),a);return v;} // inline vector<long long> range(long long a,long long b,long long c){if((b-a+c-1)/c<=0)return vector<long long>();vector<long long>v((b-a+c-1)/c);for(int i=0;i<(int)v.size();++i)v[i]=i?v[i-1]+c:a;return v;} // template<typename T>inline T reversed(T v){reverse(v.begin(),v.end());return v;} #define all(n) begin(n),end(n) template<typename T,typename E>bool chmin(T& s,const E& t){bool res=s>t;s=min<T>(s,t);return res;} template<typename T,typename E>bool chmax(T& s,const E& t){bool res=s<t;s=max<T>(s,t);return res;} const vector<lint> dx={1,0,-1,0,1,1,-1,-1}; const vector<lint> dy={0,1,0,-1,1,-1,1,-1}; #define SUM(v) accumulate(all(v),0LL) template<typename T,typename ...Args>auto make_vector(T x,int arg,Args ...args){if constexpr(sizeof...(args)==0)return vector<T>(arg,x);else return vector(arg,make_vector<T>(x,args...));} #define extrep(v,...) for(auto v:__MAKE_MAT__({__VA_ARGS__})) #define bit(n,a) ((n>>a)&1) vector<vector<long long>> __MAKE_MAT__(vector<long long> v){if(v.empty())return vector<vector<long long>>(1,vector<long long>());long long n=v.back();v.pop_back();vector<vector<long long>> ret;vector<vector<long long>> tmp=__MAKE_MAT__(v);for(auto e:tmp)for(long long i=0;i<n;++i){ret.push_back(e);ret.back().push_back(i);}return ret;} using graph=vector<vector<int>>; template<typename T>using graph_w=vector<vector<pair<int,T>>>; template<typename T,typename E>ostream& operator<<(ostream& out,pair<T,E>v){out<<"("<<v.first<<","<<v.second<<")";return out;} constexpr inline long long powll(long long a,long long b){long long res=1;while(b--)res*=a;return res;} #line 4 "data_structure/test/LC_RMQ.test.cpp" int main(){ lint n,q; cin>>n>>q; vector<lint>a(n); rep(i,n)cin>>a[i]; RMQ<lint> rmq(a); while(q--){ lint s,t; cin>>s>>t; cout<<rmq.query(s,t)<<endl; } }