Language: C++

#include <iostream>
#include <algorithm>
#include <array>
#include <cstdint>
#include <functional>
#include <map>
#include <math.h>
#include <queue>
#include <set>
#include <stack>
#include <stdlib.h>
#include <string>
#include <time.h>
#include <utility>
#include <vector>
#define INF 1000000000
#define MOD 1000000007
#define rep(i,a,b) for(uint32 i = (a); i < (b); ++i)
#define bitget(a,b) (((a) >> (b)) & 1)
#define ALL(x) (x).begin(),(x).end()
#define C(x) std::cout << #x << " : " << x << std::endl
#define scanf scanf_s

using int32 = std::int_fast32_t;
using int64 = std::int_fast64_t;
using uint32 = std::uint_fast32_t;
using uint64 = std::uint_fast64_t;

uint32 __builtin_ctz(uint32 c) {
	uint32 t = 31;
	if (c & 0x0000FFFF) { c &= 0x0000FFFF;t ^= 16; }
	if (c & 0x00FF00FF) { c &= 0x00FF00FF;t ^= 8; }
	if (c & 0x0F0F0F0F) { c &= 0x0F0F0F0F;t ^= 4; }
	if (c & 0x33333333) { c &= 0x33333333;t ^= 2; }
	if (c & 0x55555555) { c &= 0x55555555;t ^= 1; }
	return t;
}
uint32 __builtin_clz(uint32 c) {
	uint32 t = 31;
	if (c & 0xFFFF0000) { c &= 0xFFFF0000;t ^= 16; }
	if (c & 0xFF00FF00) { c &= 0xFF00FF00;t ^= 8; }
	if (c & 0xF0F0F0F0) { c &= 0xF0F0F0F0;t ^= 4; }
	if (c & 0xCCCCCCCC) { c &= 0xCCCCCCCC;t ^= 2; }
	if (c & 0xAAAAAAAA) { c &= 0xAAAAAAAA;t ^= 1; }
	return t;
}

uint32 __builtin_clrsb(uint32 c) {
	return c ? __builtin_clz(c) - 1 : 31;
}



template<typename T>
class StaticRMQ {
	std::vector<std::vector<uint32>> table;
	std::vector<T> a;
	uint32 t;
	std::vector<uint32> L, R, part;
	uint32 bitmaskr[32] = { 0xFFFFFFFF, 0xFFFFFFFE, 0xFFFFFFFC, 0xFFFFFFF8, 0xFFFFFFF0, 0xFFFFFFE0, 0xFFFFFFC0, 0xFFFFFF80, 0xFFFFFF00, 0xFFFFFE00, 0xFFFFFC00, 0xFFFFF800, 0xFFFFF000, 0xFFFFE000, 0xFFFFC000, 0xFFFF8000, 0xFFFF0000, 0xFFFE0000, 0xFFFC0000, 0xFFF80000, 0xFFF00000, 0xFFE00000, 0xFFC00000, 0xFF800000, 0xFF000000, 0xFE000000, 0xFC000000, 0xF8000000, 0xF0000000, 0xE0000000, 0xC0000000, 0x80000000, };
	uint32 bitmaskl[32] = { 0x00000001, 0x00000003, 0x00000007, 0x0000000F, 0x0000001F, 0x0000003F, 0x0000007F, 0x000000FF, 0x000001FF, 0x000003FF, 0x000007FF, 0x00000FFF, 0x00001FFF, 0x00003FFF, 0x00007FFF, 0x0000FFFF, 0x0001FFFF, 0x0003FFFF, 0x0007FFFF, 0x000FFFFF, 0x001FFFFF, 0x003FFFFF, 0x007FFFFF, 0x00FFFFFF, 0x01FFFFFF, 0x03FFFFFF, 0x07FFFFFF, 0x0FFFFFFF, 0x1FFFFFFF, 0x3FFFFFFF, 0x7FFFFFFF, 0xFFFFFFFF };
public:
	StaticRMQ(std::vector<T> &array) {
		a.resize(array.size());
		L.resize((array.size() + 0x1F) >> 5, 0);
		R.resize((array.size() + 0x1F) >> 5, 1);
		part.resize(array.size(), 0);
		t = 0;
		if (array.size() >> 5) {
			table.resize(31 ^ __builtin_clrsb(array.size() >> 5));
			table[0].resize((array.size() >> 5) + 1);
		}
		else {
			table.resize(1);
			table[0].resize(1);
		}
		while ((1u << ++t) < (array.size() >> 5)) {
			table[t].resize((array.size() >> 5) - (1 << t) + 1);
		}
		std::stack<uint32> s;
		uint32 m;
		for (t = 0;t < array.size();++t) {
			a[t] = array[t];
			part[t] |= 1 << (t & 0x1F);
			if (!(t & 0x1F)) {
				m = array[t];
				table[0][t >> 5] = t;
				while (!s.empty()) {
					s.pop();
				}
			}
			while (!s.empty()) {
				if (array[s.top()] > array[t]) {
					s.pop();
				}
				else {
					part[t] |= part[s.top()];
					break;
				}
			}
			s.push(t);
			if (m > array[t]) {
				R[t >> 5] |= 1 << (t & 0x1F);
				table[0][t >> 5] = t;
			}
			if (!((~t) & 0x1F)) {
				L[t >> 5] = part[t];
			}
		}
		for (t = 0;t + 1 < table.size();++t) {
			for (m = 0;m < table[t + 1].size();++m) {
				table[t + 1][m] = std::min(table[t][m], table[t][m + (1 << t)]);
			}
		}
	}
	uint32 operator()(uint32 begin, uint32 end) {
		uint32 l = (begin >> 5) + 1;
		uint32 r = --end >> 5;
		if (l < r) {
			t = 31 ^ __builtin_clz(r - l);
			if (a[table[t][l]] > a[table[t][r - (1 << t)]]) {
				t = table[t][r - (1 << t)];
			}
			else {
				t = table[t][l];
			}
			if (!(a[(begin&~0x1F) | __builtin_ctz(L[begin >> 5] & bitmaskr[begin & 0x1F])] > a[t])) {
				t = (begin&~0x1F) | __builtin_ctz(L[begin >> 5] & bitmaskr[begin & 0x1F]);
			}
			if (!(a[(end&~0x1F) | (31 ^ __builtin_clz(R[end >> 5] & bitmaskl[end & 0x1F]))] > a[t])) {
				t = (end&~0x1F) | (31 ^ __builtin_clz(R[end >> 5] & bitmaskl[end & 0x1F]));
			}
			return t;
		}
		if (l == r) {
			t = (begin&~0x1F) | __builtin_ctz(L[begin >> 5] & bitmaskr[begin & 0x1F]);
			if (!(a[(end&~0x1F) | (31 ^ __builtin_clz(R[end >> 5] & bitmaskl[end & 0x1F]))] > a[t])) {
				t = (end&~0x1F) | (31 ^ __builtin_clz(R[end >> 5] & bitmaskl[end & 0x1F]));
			}
			return t;
		}
		return (end&~0x1F) | __builtin_ctz(part[end] & bitmaskr[begin & 0x1F]);
	}
};

int main(void) {
	std::ios::sync_with_stdio(false);
	std::cin.tie(0);
	uint32 n, l;
	std::cin >> n >> l;
	std::vector<uint32> a(n);
	rep(i, 0, n)
		std::cin >> a[i];
	StaticRMQ<uint32> S(a);
	rep(i, 0, n - l + 1) {
		std::cout << a[S(i, i + l)] << " ";
	}
	return 0;
}

Compiler output:
a.cc:29:8: error: definition of 'uint32 __builtin_ctz(uint32)' ambiguates built-in declaration 'int __builtin_ctz(unsigned int)'
   29 | uint32 __builtin_ctz(uint32 c) {
      |        ^~~~~~~~~~~~~
a.cc:38:8: error: definition of 'uint32 __builtin_clz(uint32)' ambiguates built-in declaration 'int __builtin_clz(unsigned int)'
   38 | uint32 __builtin_clz(uint32 c) {
      |        ^~~~~~~~~~~~~
a.cc:48:8: error: definition of 'uint32 __builtin_clrsb(uint32)' ambiguates built-in declaration 'int __builtin_clrsb(int)'
   48 | uint32 __builtin_clrsb(uint32 c) {
      |        ^~~~~~~~~~~~~~~