# | TimeUTC-0 | Username | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
473361 | _L__ | Doktor (COCI17_doktor) | C++17 | 373 ms | 34344 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
// This code is written by _L__
#include <bits/stdc++.h>
using namespace std;
#define endl '\n'
#define F_word ios_base::sync_with_stdio(false), cin.tie(NULL), cout.tie(NULL);
typedef long long ll;
typedef long double ld;
const int mod = 1e9+7, N = 2e5+13, inf = 1e9+1;
const ld E = 1e-6;
#define ff first
#define ss second
int main(void){
F_word;
ll n; cin >> n;
ll pref[n+1] = {};
ll a[n+2] = {}, doc[n+4] = {};
for(int i = 1; i <= n; ++i){cin >> a[i]; doc[a[i]] = a[i]-i; pref[i]+=pref[i-1]; pref[i]+=(doc[a[i]]==0);}a[0] = 1;
if(n <= 500){
ll sum = 0, ans1 = 1, ans2 = 1;
for(int i = 1; i <= n; ++i){
for(int j = i; j <= n; ++j){
reverse(a+i, a+j+1);
ll x = 0; for(int k = 1; k <= n; ++k) x += (a[k] == k);
if(x >= sum){
ans1 = i, ans2 = j, sum = x;
}
reverse(a+i, a+j+1);
}
}
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