mmrz's library

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:heavy_check_mark: verify/aoj/dsl/2_A___segment_tree.test.cpp

Depends on

Code

# define PROBLEM "https://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=DSL_2_A"

#include "./../../../template/template.hpp"
#include "./../../../data_structure/segment_tree.hpp"

void mmrz::solve(){
	int n, q;
	cin >> n >> q;
	auto combine = [](int a, int b){return min(a, b); };
	segment_tree<int> seg(n, combine, inf<int>());
	while(q--){
		int com, x, y;
		cin >> com >> x >> y;
		if(com)cout << seg.fold(x, y + 1) << '\n';
		else seg.set(x, y);
	}
}
#line 1 "verify/aoj/dsl/2_A___segment_tree.test.cpp"
# define PROBLEM "https://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=DSL_2_A"

#line 1 "template/template.hpp"
# include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ull = unsigned long long;
const double pi = acos(-1);
template<class T>constexpr T inf() { return ::std::numeric_limits<T>::max(); }
template<class T>constexpr T hinf() { return inf<T>() / 2; }
template <typename T_char>T_char TL(T_char cX) { return tolower(cX); }
template <typename T_char>T_char TU(T_char cX) { return toupper(cX); }
template<class T> bool chmin(T& a,T b) { if(a > b){a = b; return true;} return false; }
template<class T> bool chmax(T& a,T b) { if(a < b){a = b; return true;} return false; }
int popcnt(unsigned long long n) { int cnt = 0; for (int i = 0; i < 64; i++)if ((n >> i) & 1)cnt++; return cnt; }
int d_sum(ll n) { int ret = 0; while (n > 0) { ret += n % 10; n /= 10; }return ret; }
int d_cnt(ll n) { int ret = 0; while (n > 0) { ret++; n /= 10; }return ret; }
ll gcd(ll a, ll b) { if (b == 0)return a; return gcd(b, a%b); };
ll lcm(ll a, ll b) { ll g = gcd(a, b); return a / g*b; };
ll MOD(ll x, ll m){return (x%m+m)%m; }
ll FLOOR(ll x, ll m) {ll r = (x%m+m)%m; return (x-r)/m; }
template<class T> using dijk = priority_queue<T, vector<T>, greater<T>>;
# define all(qpqpq)           (qpqpq).begin(),(qpqpq).end()
# define UNIQUE(wpwpw)        (wpwpw).erase(unique(all((wpwpw))),(wpwpw).end())
# define LOWER(epepe)         transform(all((epepe)),(epepe).begin(),TL<char>)
# define UPPER(rprpr)         transform(all((rprpr)),(rprpr).begin(),TU<char>)
# define rep(i,upupu)         for(ll i = 0, i##_len = (upupu);(i) < (i##_len);(i)++)
# define reps(i,opopo)        for(ll i = 1, i##_len = (opopo);(i) <= (i##_len);(i)++)
# define len(x)                ((ll)(x).size())
# define bit(n)               (1LL << (n))
# define pb push_back
# define eb emplace_back
# define exists(c, e)         ((c).find(e) != (c).end())

struct INIT{
	INIT(){
		std::ios::sync_with_stdio(false);
		std::cin.tie(0);
		cout << fixed << setprecision(20);
	}
}INIT;

namespace mmrz {
	void solve();
}

int main(){
	mmrz::solve();
}
#line 2 "data_structure/segment_tree.hpp"

#line 6 "data_structure/segment_tree.hpp"

template<typename T>struct segment_tree {
	using F = std::function<T(T, T)>;

	int offset;
	int n;
	std::vector<T> node;
	F combine;
	T identify;

	segment_tree(int _n, F _combine, T _identify) : segment_tree(std::vector<T>(_n, _identify), _combine, _identify) {}

	segment_tree(const std::vector<T> &v, F _combine, T _identify) : n((int)v.size()), combine(_combine), identify(_identify) {
		offset = 1;
		while(offset < n)offset <<= 1;

		node.resize(2*offset, identify);

		for(int i = 0;i < n;i++)node[i + offset] = v[i];
		for(int i = offset - 1;i >= 1;i--)node[i] = combine(node[2 * i + 0], node[2 * i + 1]);
	}

	T operator[](int x) {return node[x + offset]; }

	void set(int x, T val){
		assert(0 <= x && x < n);
		x += offset;

		node[x] = val;
		while(x >>= 1){
			node[x] = combine(node[2 * x + 0], node[2 * x + 1]);
		}
	}

	T fold(int l, int r){
		assert(0 <= l && l <= r && r <= n);
		if(l == r)return identify;

		T L = identify, R = identify;
		for(l += offset, r += offset; l < r;l >>= 1, r >>= 1){
			if(l&1)L = combine(L, node[l++]);
			if(r&1)R = combine(node[--r], R);
		}
		return combine(L, R);
	}

	T all_fold() { return node[1]; };

	int max_right(const std::function<bool(T)> f, int l = 0){
		assert(0 <= l && l <= n);
		assert(f(identify));

		if(l == n)return n;
		
		l += offset;
		T sum = identify;
		do{
			while(l%2 == 0)l >>= 1;
			if(not f(combine(sum, node[l]))){
				while(l < offset){
					l <<= 1;
					if(f(combine(sum, node[l]))){
						sum = combine(sum, node[l]);
						l++;
					}
				}
				return l - offset;
			}
			sum = combine(sum, node[l]);
			l++;
		}while((l&-l) != l);
		return n;
	}

	int min_left(const std::function<bool(T)> f, int r = -1){
		if(r == 0)return 0;
		if(r == -1)r = n;
		r += offset;
		T sum = identify;
		do{
			--r;
			while(r > 1 && (r % 2))r >>= 1;
			if(not f(combine(node[r], sum))){
				while(r < offset){
					r = r*2 + 1;
					if(f(combine(node[r], sum))){
						sum = combine(node[r], sum);
						--r;
					}
				}
				return r+1 - offset;
			}
			sum = combine(node[r], sum);
		}while((r&-r) != r);
		return 0;
	}
};
#line 5 "verify/aoj/dsl/2_A___segment_tree.test.cpp"

void mmrz::solve(){
	int n, q;
	cin >> n >> q;
	auto combine = [](int a, int b){return min(a, b); };
	segment_tree<int> seg(n, combine, inf<int>());
	while(q--){
		int com, x, y;
		cin >> com >> x >> y;
		if(com)cout << seg.fold(x, y + 1) << '\n';
		else seg.set(x, y);
	}
}
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