#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2")
#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) {
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;
}
/*=======================================================*/
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){
// all subjects win (so all books taken)
ll all_win = 0;
rep(i,n) all_win += A[i]-B[i];
ll ans = max(all_win,0ll);
// at least 1 subject doesnt win (so at least 1 book not taken)
segtree<pll> st(n);
ll s = 0, cost2 = 0;
rep(i,k) s += B[i];
vector<pll> init(n);
rep(i,2*n){
if(i+k-1 < 2*n){
if(i){
s -= B[(i-1)%n];
s += B[(i+k-1)%n];
}
ll cost1 = A[i%n]-s;
cost2 += A[i%n]-B[(i+k-1)%n];
cost1 -= cost2;
if(i < n){
init[i] = {cost1,cost2};
}
else{
st.pupd(i%n,{cost1,cost2});
}
}
if(i == n-1){
st.build(init,n);
}
if(i >= n){
ll f = i%n;
ll l = f+1, r = f+n-k;
if(l > r) conts;
l %= n, r %= n;
ll val = 0;
if(l <= r){
val = st.query(l,r).a[0][0];
}
else{
auto d1 = st.query(l,n-1);
auto d2 = st.query(0,r);
val = st.merge(d1,d2).a[0][0];
}
amax(ans,val);
}
}
return ans;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
1 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
1 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
1 ms |
864 KB |
Output is correct |
| 7 |
Correct |
1 ms |
860 KB |
Output is correct |
| 8 |
Correct |
2 ms |
604 KB |
Output is correct |
| 9 |
Correct |
2 ms |
860 KB |
Output is correct |
| 10 |
Correct |
1 ms |
344 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
226 ms |
52720 KB |
Output is correct |
| 2 |
Correct |
8 ms |
1052 KB |
Output is correct |
| 3 |
Correct |
985 ms |
210592 KB |
Output is correct |
| 4 |
Correct |
9 ms |
2396 KB |
Output is correct |
| 5 |
Correct |
36 ms |
3848 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
1 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
1 ms |
864 KB |
Output is correct |
| 7 |
Correct |
1 ms |
860 KB |
Output is correct |
| 8 |
Correct |
2 ms |
604 KB |
Output is correct |
| 9 |
Correct |
2 ms |
860 KB |
Output is correct |
| 10 |
Correct |
1 ms |
344 KB |
Output is correct |
| 11 |
Correct |
226 ms |
52720 KB |
Output is correct |
| 12 |
Correct |
8 ms |
1052 KB |
Output is correct |
| 13 |
Correct |
985 ms |
210592 KB |
Output is correct |
| 14 |
Correct |
9 ms |
2396 KB |
Output is correct |
| 15 |
Correct |
36 ms |
3848 KB |
Output is correct |
| 16 |
Correct |
877 ms |
210660 KB |
Output is correct |
| 17 |
Correct |
288 ms |
40544 KB |
Output is correct |
| 18 |
Correct |
483 ms |
49912 KB |
Output is correct |
| 19 |
Correct |
844 ms |
112968 KB |
Output is correct |
| 20 |
Correct |
892 ms |
194820 KB |
Output is correct |
| 21 |
Correct |
829 ms |
113304 KB |
Output is correct |
