#include <stdio.h>
#include <vector>
#include <map>
#include <unordered_set>
#include <queue>
#include <set>
#include <unordered_map>
#include <math.h>
#include <limits.h>
#include <algorithm>
#include <functional>
#include <iterator>
#include <algorithm>
#include <string>
#include <iostream>
using namespace std;
#define pb push_back
#define mp make_pair
typedef long long ll;
typedef unsigned long long ull;
using namespace std;
//ora.in3 -> 2137
int main() {
ios_base::sync_with_stdio(0);
cin.tie(NULL);
//int t;
//cin >> t;
//while (t --> 0) {
int n, ai;
cin >> n;
vector<int> nums;
for (int i=0; i<n; ++i) {
cin >> ai;
nums.pb(ai);
}
ll size = nums.size();
int inc = 1;
int half = (n+1) / 2;
if (n % 2 == 1) inc = 0;
int left=0, right=size-1;
ll lc=0, rc=0;
ll answer = 2 * size + 1, maxc=1;
ll count = 0;
for (int s=n; s>=1; s--) {
while (nums[left] < half) {
left++;
lc++;
}
while (nums[right] < half) {
right--;
rc++;
}
ll val = s + lc + rc;
//cout << "ANS " << val << " ===> " << min(maxc, val - size + 1) << endl;
//cout << "DBG " << lc << ":" << rc << " <- " << s << endl;
if (val >= size) {
ll mm = min(lc, rc);
count += min(mm+1, min(maxc, val - size + 1));
}
maxc++;
if (inc == 1) {
inc = 0;
half++;
} else { inc = 1; }
}
cout << answer << " " << count << 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 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 | #include <stdio.h> #include <vector> #include <map> #include <unordered_set> #include <queue> #include <set> #include <unordered_map> #include <math.h> #include <limits.h> #include <algorithm> #include <functional> #include <iterator> #include <algorithm> #include <string> #include <iostream> using namespace std; #define pb push_back #define mp make_pair typedef long long ll; typedef unsigned long long ull; using namespace std; //ora.in3 -> 2137 int main() { ios_base::sync_with_stdio(0); cin.tie(NULL); //int t; //cin >> t; //while (t --> 0) { int n, ai; cin >> n; vector<int> nums; for (int i=0; i<n; ++i) { cin >> ai; nums.pb(ai); } ll size = nums.size(); int inc = 1; int half = (n+1) / 2; if (n % 2 == 1) inc = 0; int left=0, right=size-1; ll lc=0, rc=0; ll answer = 2 * size + 1, maxc=1; ll count = 0; for (int s=n; s>=1; s--) { while (nums[left] < half) { left++; lc++; } while (nums[right] < half) { right--; rc++; } ll val = s + lc + rc; //cout << "ANS " << val << " ===> " << min(maxc, val - size + 1) << endl; //cout << "DBG " << lc << ":" << rc << " <- " << s << endl; if (val >= size) { ll mm = min(lc, rc); count += min(mm+1, min(maxc, val - size + 1)); } maxc++; if (inc == 1) { inc = 0; half++; } else { inc = 1; } } cout << answer << " " << count << endl; //} return 0; } |
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