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Cod sursa(job #355044)
#include <stdio.h>
#define MAXN 500000
#define FISIN "secventa.in"
#define FISOUT "secventa.out"
FILE *fin, *fout;
class strange_queue {
public:
strange_queue() : start(0), stop(0) { }
void add(int k, short v) {
while (stop > start && v < value[stop - 1]) --stop;
value[stop] = v; key[stop] = k; ++stop;
}
void del(int k) {
if (key[start] == k) ++start;
}
int min() { return value[start]; }
private:
int key[MAXN];
signed short value[MAXN];
int start, stop;
};
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(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(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;
}