oj.uz

답안 #312618

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
312618 2020-10-13T21:43:11 Z aZvezda 수열 (APIO14_sequence) C++14
0 / 100
 90 ms 84856 KB 
#include <bits/stdc++.h>
using namespace std;
//#pragma GCC optimize ("O3")
//#pragma GCC target ("sse4")
#define endl "\n"
typedef long long ll;
template<class T, class T2> inline ostream &operator <<(ostream &out, const pair<T, T2> &x) { out << x.first << " " << x.second; return out;}
template<class T, class T2> inline istream &operator >>(istream &in, pair<T, T2> &x) { in >> x.first >> x.second; return in;}
template<class T, class T2> inline bool chkmax(T &x, const T2 &y) { return x < y ? x = y, 1 : 0; }
template<class T, class T2> inline bool chkmin(T &x, const T2 &y) { return x > y ? x = y, 1 : 0; }
const ll mod = 1e9 + 7;
#define out(x) "{" << (#x) << ": " << x << "} "

const int MAX_N = 1e5 + 10, MAX_K = 210;
int hist[MAX_N][MAX_K], dp[MAX_N][2];
ll pref[MAX_N], arr[MAX_N];
int cnt, curr;

void output(int n, int k) {
    if(k == 0) {
        return;
    }
    output(hist[n][k], k - 1);
    cout << hist[n][k] << " ";
}

void div(int l, int r, int optl, int optr) {
    if(l > r) {return;}
    int m = (l + r) / 2ll;
    int best = optl;
    for(int tr = optl; tr <= min(m - 1, optr); tr ++) {
        ll now = dp[tr][curr ^ 1] + pref[tr] * (pref[m] - pref[tr]);
        if(chkmax(dp[m][curr], now)) {
            dp[m][curr] = now;
            best = tr;
        }
    }
    hist[m][cnt] = best;
    div(l, m - 1, optl, best);
    div(m + 1, r, best, optr);
}

signed main() {
    //ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
    int n, k;
    cin >> n >> k;
    for(int i = 1; i <= n; i ++) {
        cin >> arr[i];
        pref[i] = pref[i - 1] + arr[i];
    }

    for(int i = 1; i <= k; i ++) {
        curr = i & 1;
        cnt = i;
        for(int j = 0; j <= n; j ++) {
            dp[j][curr] = -mod;
        }
        div(1, n, 1, n);
    }

    cout << dp[n][k & 1] << endl;
    output(n, k);
    return 0;
}

/*
7 3
4 1 3 4 0 2 3
*/

Subtask #1
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB contestant found the optimal answer: 108 == 108
2 Correct 0 ms 384 KB contestant found the optimal answer: 999 == 999
3 Correct 0 ms 384 KB contestant found the optimal answer: 0 == 0
4 Correct 0 ms 384 KB contestant found the optimal answer: 1542524 == 1542524
5 Incorrect 0 ms 384 KB declared answer doesn't correspond to the split scheme: declared = 205032704, real = 4500000000
6 Halted 0 ms 0 KB -

Subtask #2
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 384 KB contestant found the optimal answer: 1093956 == 1093956
2 Correct 0 ms 384 KB contestant found the optimal answer: 302460000 == 302460000
3 Incorrect 1 ms 384 KB declared answer doesn't correspond to the split scheme: declared = -2100597223, real = 122453454361
4 Halted 0 ms 0 KB -

Subtask #3
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 512 KB contestant found the optimal answer: 610590000 == 610590000
2 Correct 1 ms 512 KB contestant found the optimal answer: 311760000 == 311760000
3 Incorrect 1 ms 512 KB declared answer doesn't correspond to the split scheme: declared = 646158965, real = 1989216017013
4 Halted 0 ms 0 KB -

Subtask #4
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 1152 KB contestant found the optimal answer: 21503404 == 21503404
2 Correct 1 ms 1152 KB contestant found the optimal answer: 140412195 == 140412195
3 Incorrect 5 ms 1152 KB declared answer doesn't correspond to the split scheme: declared = 1103519186, real = 17902527208914
4 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 8832 KB contestant found the optimal answer: 1818678304 == 1818678304
2 Correct 8 ms 8832 KB contestant found the optimal answer: 1326260195 == 1326260195
3 Incorrect 68 ms 8840 KB declared answer doesn't correspond to the split scheme: declared = -1694967322, real = 197910398032358
4 Halted 0 ms 0 KB -

Subtask #6
0 / 29.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 90 ms 84856 KB declared answer doesn't correspond to the split scheme: declared = 2147433776, real = 6442401072
2 Halted 0 ms 0 KB -