#include <bits/stdc++.h>
using namespace std;
void solve() {
int n, k;
cin >> n;
vector<int> oceny(n, 0);
unordered_map<int, int> valtopos;
for (int i = 0; i < n; i++) {
cin >> k;
oceny[i] = k;
valtopos.insert({k, i});
}
long long ways = 0, opt = 2*n + 1;
int left = valtopos[n], right = valtopos[n], pos, maxlen, diff;
int sr, er;
for (int len = 1; len <= n; len++) {
maxlen = 1 + len / 2;
pos = valtopos[n-maxlen+1];
if (pos <= left) {
left = pos;
} else if (right <= pos) {
right = pos;
}
if (right - left + 1 < len) {
diff = len - right + left - 1;
sr = (left - min(left, diff)) + len - 1;
er = right + min(diff, n - right -1);
ways += er - sr + 1;
} else if (right - left + 1 == len) {
ways++;
}
}
cout << opt << " " << ways << "\n";
}
int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
solve();
}
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 | #include <bits/stdc++.h> using namespace std; void solve() { int n, k; cin >> n; vector<int> oceny(n, 0); unordered_map<int, int> valtopos; for (int i = 0; i < n; i++) { cin >> k; oceny[i] = k; valtopos.insert({k, i}); } long long ways = 0, opt = 2*n + 1; int left = valtopos[n], right = valtopos[n], pos, maxlen, diff; int sr, er; for (int len = 1; len <= n; len++) { maxlen = 1 + len / 2; pos = valtopos[n-maxlen+1]; if (pos <= left) { left = pos; } else if (right <= pos) { right = pos; } if (right - left + 1 < len) { diff = len - right + left - 1; sr = (left - min(left, diff)) + len - 1; er = right + min(diff, n - right -1); ways += er - sr + 1; } else if (right - left + 1 == len) { ways++; } } cout << opt << " " << ways << "\n"; } int main() { ios::sync_with_stdio(false); cin.tie(nullptr); solve(); } |
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