# | Time | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
26600 | model_code | Lollipop (POI11_liz) | C11 | 639 ms | 17720 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
/*************************************************************************
* *
* XVIII Olimpiada Informatyczna *
* *
* Zadanie: Lizak *
* Autor: Mateusz Baranowski *
* Zlozonosc czasowa: O(n + m) *
* pamieciowa: O(n) *
* Opis: Rozwiazanie wzorcowe *
* *
*************************************************************************/
#include <stdio.h>
#define MAX_N 1000000
#define MAX_K 2000000
int n, m; /* ilosc segmentow lizaka i ilosc rozwazanych cen */
int wa[MAX_K + 1], wb[MAX_K + 1]; /* [wa[j], wb[j]] to przedzial o koszcie j */
int i, l, sum = 0;
int max[2]; /* najwieksza cena parzysta i nieparzysta */
char s[MAX_N + 1]; /* opis lizaka */
/* funkcja obliczajaca wa[x], wb[x] dla (x <= sum) i ((sum + x) mod 2 == 0) */
void oblicz_przedzialy(int sum) {
wa[sum] = i + 1;
wb[sum] = l + 1;
while (sum > 2) {
while ((sum > 2) && (s[i] == 'T')) {
sum -= 2;
wa[sum] = ++i + 1;
wb[sum] = l + 1;
}
while ((sum > 2) && (s[l] == 'T')) {
sum -= 2;
wa[sum] = i + 1;
wb[sum] = --l + 1;
}
if (sum > 2) {
sum -= 2;
wa[sum] = ++i + 1;
wb[sum] = --l + 1;
}
}
}
int main() {
scanf("%d %d", &n, &m);
scanf("%s", s);
for (l = 0; l < n; ++l)
if (s[l] == 'T')
sum += 2;
else
sum += 1;
i = 0;
l = n - 1;
max[sum % 2] = sum;
oblicz_przedzialy(sum);
/* szukamy 'W' najblizszego krawedzi lizaka by wyznaczyc najwiekszy *
* fragment, ktorego cena ma inna parzystosc niz cena calego lizaka */
i = 0;
while ((i < n) && (s[i] == 'T'))
++i;
l = 0;
while ((i < n - l) && (s[n - l - 1] == 'T'))
++l;
if (s[i] == 'T') /* brak smaku waniliowego */
max[1] = 0;
else {
if (i < l) { /* 'W' blizej lewego konca */
sum -= 2 * i + 1;
max[sum % 2] = sum;
i += 1;
l = n - 1;
} else { /* 'W' blizej prawego konca (lub rownie blisko) */
sum -= 2 * l + 1;
max[sum % 2] = sum;
i = 0;
l = n - l - 2;
}
oblicz_przedzialy(sum);
}
/* odpowiadamy na zapytania korzystajac z tablic wa[] i wb[] */
for (i = 0; i < m; ++i) {
scanf("%d", &sum);
if (max[sum % 2] < sum)
printf("NIE\n");
else
printf("%d %d\n", wa[sum], wb[sum]);
}
return 0;
}
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