oj.uz

Submission #73938

# Submission time Handle Problem Language Result Execution time Memory
73938 2018-08-29T09:49:59 Z jiaqing23 Homecoming (BOI18_homecoming) C++14
100 / 100
 267 ms 185688 KB 
#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;

#define fi first
#define se second
#define mp make_pair
#define pb push_back
#define fbo find_by_order
#define ook order_of_key

typedef long long ll;
typedef pair<ll,ll> pi;
typedef vector<ll> vi;
typedef long double ld;
typedef tree<ll, null_type, less<ll>, rb_tree_tag, tree_order_statistics_node_update> pbds;
typedef set<ll>::iterator sit;
typedef map<ll,ll>::iterator mit;
typedef pair<int,pair<int,int> > tri;

ll dp[2000050][2];
ll sum[4000050];

long long solve(int N, int K, int *A, int *B){
    ll ans = 0;
    //din pass first subject
    dp[0][0] = 0;
    dp[0][1] = -(ll)1e18;
    sum[0] = B[0];
    for(int i = 1; i < N; i++) sum[i] = sum[i-1] + (ll)B[i];
    for(int i = N; i < 2 * N; i++) sum[i] = sum[N-1] + sum[i-N];
    for(int i = 1; i < N; i++){
        dp[i][0] = max(dp[i-1][0], dp[i-1][1]);
        dp[i][1] = (ll)A[i] + max(dp[i-1][0] - (sum[i+K-1]-sum[i-1]), dp[i-1][1] - (ll)B[(i+K-1)%N]);
    }
    ans = max(ans, max(dp[N-1][0], dp[N-1][1]));

    //pass the first subject
    dp[0][1] = (ll)A[0] - sum[K-1];
    dp[0][0] = -(ll)1e18;
    for(int i = 0; i < K; i++) B[i] = 0;
    sum[0] = B[0];
    for(int i = 1; i < N; i++) sum[i] = sum[i-1] + (ll)B[i];
    for(int i = N; i < 2 * N; i++) sum[i] = sum[N-1] + sum[i-N];
    for(int i = 1; i < N ; i++){
        dp[i][0] = max(dp[i-1][0], dp[i-1][1]);
        dp[i][1] = (ll)A[i] + max(dp[i-1][0] - (sum[i+K-1]-sum[i-1]), dp[i-1][1] - (ll)B[(i+K-1)%N]);
        //cout<<i<<' '<<dp[i][0]<<' '<<dp[i][1] <<endl;

    }
    ans = max(ans, max(dp[N-1][0], dp[N-1][1]));
    return ans;
}

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 3 ms 416 KB Output is correct
4 Correct 3 ms 444 KB Output is correct
5 Correct 3 ms 620 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 3 ms 416 KB Output is correct
4 Correct 3 ms 444 KB Output is correct
5 Correct 3 ms 620 KB Output is correct
6 Correct 3 ms 772 KB Output is correct
7 Correct 3 ms 772 KB Output is correct
8 Correct 4 ms 772 KB Output is correct
9 Correct 3 ms 772 KB Output is correct
10 Correct 3 ms 772 KB Output is correct

Subtask #3
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 78 ms 20160 KB Output is correct
2 Correct 5 ms 20160 KB Output is correct
3 Correct 240 ms 79052 KB Output is correct
4 Correct 5 ms 79052 KB Output is correct
5 Correct 15 ms 79052 KB Output is correct

Subtask #4
38.0 / 38.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 3 ms 416 KB Output is correct
4 Correct 3 ms 444 KB Output is correct
5 Correct 3 ms 620 KB Output is correct
6 Correct 3 ms 772 KB Output is correct
7 Correct 3 ms 772 KB Output is correct
8 Correct 4 ms 772 KB Output is correct
9 Correct 3 ms 772 KB Output is correct
10 Correct 3 ms 772 KB Output is correct
11 Correct 78 ms 20160 KB Output is correct
12 Correct 5 ms 20160 KB Output is correct
13 Correct 240 ms 79052 KB Output is correct
14 Correct 5 ms 79052 KB Output is correct
15 Correct 15 ms 79052 KB Output is correct
16 Correct 267 ms 79052 KB Output is correct
17 Correct 132 ms 79052 KB Output is correct
18 Correct 231 ms 79052 KB Output is correct
19 Correct 209 ms 124040 KB Output is correct
20 Correct 215 ms 185688 KB Output is correct
21 Correct 221 ms 185688 KB Output is correct