#include<cstdio>
#include<iostream>
#include<algorithm>
#include<string>
#include<vector>
#include<unordered_map>
using namespace std;
typedef vector<int> VI;
typedef long long LL;
#define FOR(x, b, e) for(int x=b; x<=(e); ++x)
#define FORD(x, b, e) for(int x=b; x>=(e); --x)
#define REP(x, n) for(int x=0; x<(n); ++x)
#define VAR(v, n) __typeof(n) v = (n)
#define ALL(c) (c).begin(), (c).end()
#define SIZE(x) ((int)(x).size())
#define FOREACH(i, c) for(VAR(i, (c).begin()); i != (c).end(); ++i)
#define PB push_back
#define ST first
#define ND second
int main() {
ios_base::sync_with_stdio(0);
int n;
cin >> n;
VI a(n);
VI ind(n + 1);
REP(i, n) {
cin >> a[i];
ind[a[i]] = i;
}
int l = ind[n], r = ind[n];
LL res = 0;
int len = 0;
for(int i = n; len <= n; i--) {
l = min(l, ind[i]);
r = max(r, ind[i]);
if(r - l + 1 <= len) {
int diff = len - (r - l + 1);
int li = max(0, l - diff);
int ri = min(n - 1, r + diff);
res += (ri - li + 1) - len + 1;
}
len++;
if(r - l + 1 <= len) {
int diff = len - (r - l + 1);
int li = max(0, l - diff);
int ri = min(n - 1, r + diff);
res += (ri - li + 1) - len + 1;
}
len++;
}
cout << (2 * a.size() + 1) << ' ' << res << '\n';
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 | #include<cstdio> #include<iostream> #include<algorithm> #include<string> #include<vector> #include<unordered_map> using namespace std; typedef vector<int> VI; typedef long long LL; #define FOR(x, b, e) for(int x=b; x<=(e); ++x) #define FORD(x, b, e) for(int x=b; x>=(e); --x) #define REP(x, n) for(int x=0; x<(n); ++x) #define VAR(v, n) __typeof(n) v = (n) #define ALL(c) (c).begin(), (c).end() #define SIZE(x) ((int)(x).size()) #define FOREACH(i, c) for(VAR(i, (c).begin()); i != (c).end(); ++i) #define PB push_back #define ST first #define ND second int main() { ios_base::sync_with_stdio(0); int n; cin >> n; VI a(n); VI ind(n + 1); REP(i, n) { cin >> a[i]; ind[a[i]] = i; } int l = ind[n], r = ind[n]; LL res = 0; int len = 0; for(int i = n; len <= n; i--) { l = min(l, ind[i]); r = max(r, ind[i]); if(r - l + 1 <= len) { int diff = len - (r - l + 1); int li = max(0, l - diff); int ri = min(n - 1, r + diff); res += (ri - li + 1) - len + 1; } len++; if(r - l + 1 <= len) { int diff = len - (r - l + 1); int li = max(0, l - diff); int ri = min(n - 1, r + diff); res += (ri - li + 1) - len + 1; } len++; } cout << (2 * a.size() + 1) << ' ' << res << '\n'; return 0; } |
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