#include <bits/stdc++.h>
using namespace std;
#define int long long
#define pi pair<int, int>
#define pii pair<int, pi>
#define fi first
#define se second
#ifdef _WIN32
#define getchar_unlocked _getchar_nolock
#endif
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
int n, A[500005], S[500005], q;
int ans;
void dnc(int l, int r, int optl, int optr){
if(l > r)return;
int mid = (l + r) >> 1;
int mx = -1e18, opt = optl;
for(int i = optl; i <= min(optr, mid - 1); i++){
if(mid * 2 - i > n)continue;
if(A[i] + A[mid] + S[mid * 2 - i] > mx){
mx = A[i] + A[mid] + S[mid * 2 - i];
opt = i;
}
}
ans = max(ans, mx);
dnc(l, mid - 1, optl, opt);
dnc(mid + 1, r, opt, optr);
}
void solve(){
cin >> n;
for(int i = 1; i <= n; i++)cin >> A[i];
S[n] = A[n];
for(int i = n - 1; i >= 1; i--)S[i] = max(S[i + 1], A[i]);
cin >> q;
while(q--){
int l, r; cin >> l >> r;
}
dnc(1, n, 1, n);
cout << ans;
}
main(){
ios::sync_with_stdio(0);cin.tie(0);
int tc = 1;
//cin >> tc;
for(int tc1=1;tc1<=tc;tc1++){
// cout << "Case #" << tc1 << ": ";
solve();
}
}
Compilation message
jumps.cpp:45:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
45 | main(){
| ^~~~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
2396 KB |
Output is correct |
2 |
Incorrect |
1 ms |
2396 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
2396 KB |
Output is correct |
2 |
Incorrect |
1 ms |
2396 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
20 ms |
8540 KB |
Output is correct |
2 |
Correct |
19 ms |
8772 KB |
Output is correct |
3 |
Correct |
22 ms |
8540 KB |
Output is correct |
4 |
Correct |
20 ms |
8540 KB |
Output is correct |
5 |
Correct |
20 ms |
8540 KB |
Output is correct |
6 |
Correct |
17 ms |
7752 KB |
Output is correct |
7 |
Incorrect |
16 ms |
7772 KB |
Output isn't correct |
8 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
2396 KB |
Output is correct |
2 |
Incorrect |
1 ms |
2396 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |