#define _CRT_SECURE_NO_WARNINGS
#include <bits/stdc++.h>
//#include <ext/pb_ds/tree_policy.hpp>
//#include <ext/pb_ds/assoc_container.hpp>
using namespace std;
//using namespace __gnu_pbds;
#define FOR(i,start,end) for(int i=start;i<(int)(end);i++)
#define FORE(i,start,end) for(int i=start;i<=(int)end;i++)
#define RFOR(i,start,end) for(int i = start; i>end; i--)
#define RFORE(i,start,end) for(int i = start; i>=end; i--)
#define vsort(a) sort(a.begin(), a.end());
#define mp make_pair
#define v vector
#define sf scanf
#define pf printf
typedef long long ll;
typedef pair<int, int > pii;
//template <class T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
void io();
const int MAXN = 500010;
int N;
int A[MAXN];
int pref[MAXN];
v<pii> splits[MAXN * 2];
int main() {
io();
cin >> N;
FORE(i, 1, N) {
cin >> A[i];
pii swit = { i, A[i] };
if (i > A[i])
swap(swit.first, swit.second);
splits[i + A[i]].push_back(swit);
pref[i] = pref[i - 1] + (i == A[i] ? 1 : 0);
}
int ans = pref[N];
pii best = { 1,1 };
FORE(s, 2, 2 * N) if (splits[s].size() > 0) {
sort(splits[s].begin(), splits[s].end(), greater<pii>());
FOR(i, 0, splits[s].size()) {
pii intv = splits[s][i];
int numG = i + 1 + pref[N] - (pref[intv.second] - pref[intv.first - 1]);
if (numG > ans) {
ans = numG;
best = intv;
}
}
}
cout << A[best.first] << " " << A[best.second] << "\n";
return 0;
}
void io() {
#ifdef LOCAL_PROJECT
freopen("a.in", "r", stdin);
//freopen("a.out","w",stdout); // console output is better (in most cases)
#else
// add i/o method of specific testing system
#endif
ios_base::sync_with_stdio(false);
cin.tie(NULL);
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
26 ms |
23800 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
22 ms |
23936 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
23 ms |
23936 KB |
Output is correct |
2 |
Correct |
24 ms |
23952 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
23 ms |
24028 KB |
Output is correct |
2 |
Correct |
23 ms |
24056 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
27 ms |
24260 KB |
Output is correct |
2 |
Correct |
26 ms |
24260 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
27 ms |
24260 KB |
Output is correct |
2 |
Correct |
27 ms |
24260 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
30 ms |
24452 KB |
Output is correct |
2 |
Correct |
109 ms |
30428 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
64 ms |
30428 KB |
Output is correct |
2 |
Correct |
46 ms |
30428 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
317 ms |
39604 KB |
Output is correct |
2 |
Correct |
155 ms |
39604 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
144 ms |
39604 KB |
Output is correct |
2 |
Correct |
131 ms |
42988 KB |
Output is correct |