Submission #254189

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
254189	2020-07-29 13:29:42	shayan_p	Homecoming (BOI18_homecoming)	C++14	100 / 100	189 ms	118140 KiB

homecoming

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// And you curse yourself for things you never done
#include<bits/stdc++.h>
#define F first
#define S second
#define PB push_back
#define sz(s) int((s).size())
#define bit(n,k) (((n)>>(k))&1)
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
const int maxn = 2e6 + 10, mod = 1e9 + 7;
const ll inf = 1e18;
int a[maxn], b[maxn];
ll dp[maxn][2], A[maxn], B[maxn];
ll solve(int n, int k, int *a, int *b){
    for(int i = 0; i < n; i++)
  A[i] = a[i] - b[i];
    ll sm = 0;
    for(int i = 1; i <= k-1; i++)
  sm+= a[n-i];
    for(int i = 0; i < n; i++)
  B[i] = -sm, sm+= a[i], sm-= a[(i + n - k + 1) % n];
    ll ans = 0;
 
 
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• Subtask 1: 13 / 13
• Subtask 2: 18 / 18
• Subtask 3: 31 / 31
• Subtask 4: 38 / 38