#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
template<typename T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long int ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define pb push_back
#define endl '\n'
#define sz(a) (int)a.size()
#define setbits(x) __builtin_popcountll(x)
#define ff first
#define ss second
#define conts continue
#define ceil2(x,y) ((x+y-1)/(y))
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define yes cout << "Yes" << endl
#define no cout << "No" << endl
#define rep(i,n) for(int i = 0; i < n; ++i)
#define rep1(i,n) for(int i = 1; i <= n; ++i)
#define rev(i,s,e) for(int i = s; i >= e; --i)
#define trav(i,a) for(auto &i : a)
template<typename T>
void amin(T &a, T b) {
a = min(a,b);
}
template<typename T>
void amax(T &a, T b) {
a = max(a,b);
}
#ifdef LOCAL
#include "debug.h"
#else
#define debug(...) 42
#endif
/*
refs:
edi
*/
const int MOD = 1e9 + 7;
const int N = 1e5 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;
#include "homecoming.h"
template<typename T>
struct segtree {
// https://codeforces.com/blog/entry/18051
/*=======================================================*/
struct data {
ll a[2][2];
data(){
rep(i,2) rep(j,2) a[i][j] = -inf2;
}
};
data neutral = data();
data merge(data &left, data &right) {
data curr;
rep(a,2){
rep(b,2){
amax(curr.a[a][b],left.a[a][b]);
amax(curr.a[a][b],right.a[a][b]);
rep(c,2){
amax(curr.a[a][c],left.a[a][b]+right.a[b][c]);
}
}
}
return curr;
}
void create(int i, T v) {
auto [x,y] = v;
tr[i].a[0][0] = max(x+y,0ll);
tr[i].a[0][1] = x;
tr[i].a[1][0] = y;
tr[i].a[1][1] = -inf2;
}
void modify(int i, T v) {
}
/*=======================================================*/
int n;
vector<data> tr;
segtree() {
}
segtree(int siz) {
init(siz);
}
void init(int siz) {
n = siz;
tr.assign(2 * n, neutral);
}
void build(vector<T> &a, int siz) {
rep(i, siz) create(i + n, a[i]);
rev(i, n - 1, 1) tr[i] = merge(tr[i << 1], tr[i << 1 | 1]);
}
void pupd(int i, T v) {
modify(i + n, v);
for (i = (i + n) >> 1; i; i >>= 1) tr[i] = merge(tr[i << 1], tr[i << 1 | 1]);
}
data query(int l, int r) {
data resl = neutral, resr = neutral;
for (l += n, r += n; l <= r; l >>= 1, r >>= 1) {
if (l & 1) resl = merge(resl, tr[l++]);
if (!(r & 1)) resr = merge(tr[r--], resr);
}
return merge(resl, resr);
}
};
ll solve(int n, int k, int *A, int *B){
vector<int> a(2*n+5), b(2*n+5);
rep(i,2*n) a[i+1] = A[i%n], b[i+1] = B[i%n];
vector<ll> pb(2*n+5);
rep1(i,2*n) pb[i] = pb[i-1]+b[i];
vector<ll> cost1(2*n+5), cost2(2*n+5);
rep1(i,2*n){
if(i+k-1 > 2*n) break;
ll s = pb[i+k-1]-pb[i-1];
cost1[i] = a[i]-s;
cost2[i] = a[i]-b[i+k-1];
}
rep1(i,2*n) cost2[i] += cost2[i-1];
rep1(i,2*n) cost1[i] -= cost2[i];
// all subjects win (so all books taken)
ll all_win = 0;
rep1(i,n) all_win += a[i]-b[i];
ll ans = all_win;
segtree<pll> st(2*n+5);
vector<pll> curr(2*n+5);
rep1(i,2*n) curr[i] = {cost1[i],cost2[i]};
st.build(curr,2*n+1);
// at least 1 subject doesnt win (so at least 1 book not taken)
rep1(f,n){
// f = first book not taken
ll dp[2];
memset(dp,-0x3f,sizeof dp);
dp[0] = 0;
ll val = st.query(f+1,f+n-k).a[0][0];
amax(ans,val);
// for(int i = f+1; i+k-1 < f+n; ++i){
// amax(dp[1],dp[0]+cost1[i]);
// amax(dp[0],dp[1]+cost2[i]);
// }
// amax(ans,dp[0]);
}
return ans;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| 2 |
Correct |
1 ms |
344 KB |
Output is correct |
| 3 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 4 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| 2 |
Correct |
1 ms |
344 KB |
Output is correct |
| 3 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 4 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
225 ms |
113768 KB |
Output is correct |
| 2 |
Correct |
8 ms |
684 KB |
Output is correct |
| 3 |
Runtime error |
198 ms |
262144 KB |
Execution killed with signal 9 |
| 4 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| 2 |
Correct |
1 ms |
344 KB |
Output is correct |
| 3 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 4 |
Halted |
0 ms |
0 KB |
- |
