// Krzysztof Baranski (2021.12.09)
#include <cstdio>
using namespace std;
int n;
int rates[1000009];
int position[1000009];
inline int min(int x, int y) {
return (x < y ? x : y);
}
int main() {
scanf("%d\n", &n);
int range_begin, range_end;
for(int i=0; i<n; ++i) {
scanf("%d", rates + i);
position[rates[i]] = i;
if(rates[i] == n) {
range_begin = i;
range_end = i;
}
}
int result_value = 2*n + 1;
long long result_count = 1;
int max_counted_range_size = 1;
if(n == 1) {
printf("%d %lld\n", result_value, result_count);
return 0;
}
int range = 1;
for(int k = 1; k < n; ++k) {
int num = n-k;
range_begin = ((position[num] < range_begin) ? position[num] : range_begin);
range_end = ((position[num] > range_end) ? position[num] : range_end);
int range_size = (range_end - range_begin + 1);
int max_range_size = min(2*k+1, n);
if(range_size > max_range_size) {
continue;
}
if(range_size > max_counted_range_size) {
result_count++;
max_counted_range_size = range_size;
}
while(max_counted_range_size < max_range_size) {
max_counted_range_size++;
int count_more = (range_size
+ min(max_counted_range_size - range_size, range_begin)
+ min(max_counted_range_size - range_size, n - range_end - 1)
- max_counted_range_size
+ 1);
if(count_more > 0) result_count += count_more;
}
if(max_counted_range_size > n) break;
}
printf("%d %lld\n", result_value, result_count);
return 0;
}
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 | // Krzysztof Baranski (2021.12.09) #include <cstdio> using namespace std; int n; int rates[1000009]; int position[1000009]; inline int min(int x, int y) { return (x < y ? x : y); } int main() { scanf("%d\n", &n); int range_begin, range_end; for(int i=0; i<n; ++i) { scanf("%d", rates + i); position[rates[i]] = i; if(rates[i] == n) { range_begin = i; range_end = i; } } int result_value = 2*n + 1; long long result_count = 1; int max_counted_range_size = 1; if(n == 1) { printf("%d %lld\n", result_value, result_count); return 0; } int range = 1; for(int k = 1; k < n; ++k) { int num = n-k; range_begin = ((position[num] < range_begin) ? position[num] : range_begin); range_end = ((position[num] > range_end) ? position[num] : range_end); int range_size = (range_end - range_begin + 1); int max_range_size = min(2*k+1, n); if(range_size > max_range_size) { continue; } if(range_size > max_counted_range_size) { result_count++; max_counted_range_size = range_size; } while(max_counted_range_size < max_range_size) { max_counted_range_size++; int count_more = (range_size + min(max_counted_range_size - range_size, range_begin) + min(max_counted_range_size - range_size, n - range_end - 1) - max_counted_range_size + 1); if(count_more > 0) result_count += count_more; } if(max_counted_range_size > n) break; } printf("%d %lld\n", result_value, result_count); return 0; } |
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