#include <iostream>
#include <set>
using namespace std;
int n;
int T[1000000];
set<pair<int, int> > S;
void REK(int i, int k, int dM) {
pair<int, int> el;
el.first = i;
el.second = k;
S.insert(el);
if (2 * T[i] < dM) {
el.first = i + 1;
el.second = k;
if (S.find(el) == S.end()) REK(i + 1, k, dM + 1);
}
if (2 * T[k] < dM) {
el.first = i;
el.second = k - 1;
if (S.find(el) == S.end()) REK(i, k - 1, dM + 1);
}
return;
}
int main() {
cin >> n;
for (int i = 1; i <= n; i++) {
cin >> T[i];
if (T[i] == n) {
pair<int, int> el;
el.first = i;
el.second = i;
S.insert(el);
}
}
REK(1, n, n + 1);
cout << 2 * n + 1 << " " << S.size() << endl;
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 | #include <iostream> #include <set> using namespace std; int n; int T[1000000]; set<pair<int, int> > S; void REK(int i, int k, int dM) { pair<int, int> el; el.first = i; el.second = k; S.insert(el); if (2 * T[i] < dM) { el.first = i + 1; el.second = k; if (S.find(el) == S.end()) REK(i + 1, k, dM + 1); } if (2 * T[k] < dM) { el.first = i; el.second = k - 1; if (S.find(el) == S.end()) REK(i, k - 1, dM + 1); } return; } int main() { cin >> n; for (int i = 1; i <= n; i++) { cin >> T[i]; if (T[i] == n) { pair<int, int> el; el.first = i; el.second = i; S.insert(el); } } REK(1, n, n + 1); cout << 2 * n + 1 << " " << S.size() << endl; return 0; } |
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