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Cod sursa(job #355038)
#include <stdio.h>
#include <list>
#include <deque>
#define FISIN "secventa.in"
#define FISOUT "secventa.out"
FILE *fin, *fout;
class strange_queue {
public:
struct elem {
elem(int k, int v) : key(k), value(v) { }
int key, value;
};
void add(const elem& e) {
while (!m_list.empty() && (e.value < m_list.back().value)) m_list.pop_back();
m_list.push_back(e);
}
void del(int key) {
if (m_list.front().key == key) m_list.pop_front();
}
int min() { return m_list.front().value; }
private:
std::deque<elem> m_list;
};
strange_queue q;
int main() {
fin = fopen(FISIN, "rt");
fout = fopen(FISOUT, "wt");
int n, k; fscanf(fin, "%d %d", &n, &k);
for (int i = 0; i < k; ++i) {
int a;
fscanf(fin, "%d", &a);
q.add(strange_queue::elem(i, a));
}
int best_start = 0; int best_base = q.min();
for (int i = k; i < n; ++i) {
int a; fscanf(fin, "%d", &a);
int start = i - k;
q.del(start);
q.add(strange_queue::elem(i, a));
int m = q.min();
if (m > best_base) {
best_base = m;
best_start = i - k + 1;
}
}
best_start++;
fprintf(fout, "%d %d %d\n", best_start, best_start + k - 1, best_base);
fclose(fout);
fclose(fin);
return 0;
}