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답안 #257497

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
257497 2020-08-04T10:59:58 Z karma Feast (NOI19_feast) C++14
100 / 100
 182 ms 11020 KB 
#include <bits/stdc++.h>
#define pb          emplace_back
#define ll          long long
#define fi          first
#define se          second
#define mp          make_pair
//#define int         int64_t

using namespace std;

const int N = int(6e5) + 7;
typedef pair<ll, int> pii;

pii f[N][2];
int n, k, a[N];

/// 0 - ok
/// 1 - opening

pii operator - (const pii& a, const ll& x) {
    return pii(a.fi - x, a.se + 1);
}
pii operator + (const pii& a, const ll& x) {
    return pii(a.fi + x, a.se);
}
pii max(const pii& x, const pii& y) {
    if(x.fi == y.fi) return x.se < y.se? x: y;
    return x.fi > y.fi? x: y;
}

pii check(ll mid) {
    for(int i = 1; i <= n; ++i) {
        f[i][1] = max(f[i - 1][1], f[i - 1][0]) + a[i];
        f[i][0] = max(f[i - 1][1] - mid, f[i - 1][0]);
    }
    return max(f[n][0], f[n][1] - mid);
}

int32_t main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0), cout.tie(0);
    #define Task        "test"
    if(fopen(Task".inp", "r")) {
        freopen(Task".inp", "r", stdin);
        freopen(Task".out", "w", stdout);
    }
    cin >> n >> k;
    for(int i = 1; i <= n; ++i) cin >> a[i];
    ll low = 0, mid, high = 1ll * n * (int)1e9;
    while(low <= high) {
        mid = (low + high) >> 1;
        if(check(mid).se > k) low = mid + 1;
        else high = mid - 1;
    }
    cout << check(low).fi + 1ll * low * k;
}

Compilation message

feast.cpp: In function 'int32_t main()':
feast.cpp:44:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
         freopen(Task".inp", "r", stdin);
         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
feast.cpp:45:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
         freopen(Task".out", "w", stdout);
         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 107 ms 10728 KB Output is correct
2 Correct 101 ms 10744 KB Output is correct
3 Correct 106 ms 10872 KB Output is correct
4 Correct 102 ms 10872 KB Output is correct
5 Correct 114 ms 10744 KB Output is correct
6 Correct 106 ms 10616 KB Output is correct
7 Correct 99 ms 10616 KB Output is correct
8 Correct 102 ms 10744 KB Output is correct
9 Correct 101 ms 10664 KB Output is correct
10 Correct 107 ms 10872 KB Output is correct

Subtask #2
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 90 ms 10708 KB Output is correct
2 Correct 89 ms 10856 KB Output is correct
3 Correct 86 ms 10624 KB Output is correct
4 Correct 86 ms 10752 KB Output is correct
5 Correct 104 ms 10616 KB Output is correct
6 Correct 87 ms 10616 KB Output is correct
7 Correct 101 ms 10872 KB Output is correct
8 Correct 112 ms 10872 KB Output is correct
9 Correct 106 ms 10616 KB Output is correct
10 Correct 93 ms 10872 KB Output is correct

Subtask #3
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 146 ms 10744 KB Output is correct
2 Correct 130 ms 10656 KB Output is correct
3 Correct 129 ms 10744 KB Output is correct
4 Correct 124 ms 10616 KB Output is correct
5 Correct 125 ms 10744 KB Output is correct
6 Correct 126 ms 10872 KB Output is correct
7 Correct 182 ms 11000 KB Output is correct
8 Correct 126 ms 10748 KB Output is correct
9 Correct 130 ms 10872 KB Output is correct
10 Correct 131 ms 10792 KB Output is correct

Subtask #4
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct

Subtask #5
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 0 ms 384 KB Output is correct
14 Correct 0 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 0 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 0 ms 384 KB Output is correct
20 Correct 0 ms 384 KB Output is correct

Subtask #6
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 0 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 0 ms 384 KB Output is correct
14 Correct 0 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 0 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 0 ms 384 KB Output is correct
20 Correct 0 ms 384 KB Output is correct
21 Correct 1 ms 384 KB Output is correct
22 Correct 2 ms 384 KB Output is correct
23 Correct 1 ms 384 KB Output is correct
24 Correct 1 ms 384 KB Output is correct
25 Correct 1 ms 384 KB Output is correct
26 Correct 1 ms 384 KB Output is correct
27 Correct 1 ms 384 KB Output is correct
28 Correct 1 ms 384 KB Output is correct
29 Correct 1 ms 384 KB Output is correct
30 Correct 1 ms 384 KB Output is correct

Subtask #7
29.0 / 29.0

# 결과 실행 시간 메모리 Grader output
1 Correct 107 ms 10728 KB Output is correct
2 Correct 101 ms 10744 KB Output is correct
3 Correct 106 ms 10872 KB Output is correct
4 Correct 102 ms 10872 KB Output is correct
5 Correct 114 ms 10744 KB Output is correct
6 Correct 106 ms 10616 KB Output is correct
7 Correct 99 ms 10616 KB Output is correct
8 Correct 102 ms 10744 KB Output is correct
9 Correct 101 ms 10664 KB Output is correct
10 Correct 107 ms 10872 KB Output is correct
11 Correct 90 ms 10708 KB Output is correct
12 Correct 89 ms 10856 KB Output is correct
13 Correct 86 ms 10624 KB Output is correct
14 Correct 86 ms 10752 KB Output is correct
15 Correct 104 ms 10616 KB Output is correct
16 Correct 87 ms 10616 KB Output is correct
17 Correct 101 ms 10872 KB Output is correct
18 Correct 112 ms 10872 KB Output is correct
19 Correct 106 ms 10616 KB Output is correct
20 Correct 93 ms 10872 KB Output is correct
21 Correct 146 ms 10744 KB Output is correct
22 Correct 130 ms 10656 KB Output is correct
23 Correct 129 ms 10744 KB Output is correct
24 Correct 124 ms 10616 KB Output is correct
25 Correct 125 ms 10744 KB Output is correct
26 Correct 126 ms 10872 KB Output is correct
27 Correct 182 ms 11000 KB Output is correct
28 Correct 126 ms 10748 KB Output is correct
29 Correct 130 ms 10872 KB Output is correct
30 Correct 131 ms 10792 KB Output is correct
31 Correct 0 ms 384 KB Output is correct
32 Correct 0 ms 384 KB Output is correct
33 Correct 1 ms 384 KB Output is correct
34 Correct 1 ms 384 KB Output is correct
35 Correct 0 ms 384 KB Output is correct
36 Correct 0 ms 384 KB Output is correct
37 Correct 0 ms 384 KB Output is correct
38 Correct 1 ms 384 KB Output is correct
39 Correct 1 ms 384 KB Output is correct
40 Correct 1 ms 384 KB Output is correct
41 Correct 1 ms 384 KB Output is correct
42 Correct 1 ms 384 KB Output is correct
43 Correct 0 ms 384 KB Output is correct
44 Correct 0 ms 384 KB Output is correct
45 Correct 1 ms 384 KB Output is correct
46 Correct 1 ms 384 KB Output is correct
47 Correct 0 ms 384 KB Output is correct
48 Correct 1 ms 384 KB Output is correct
49 Correct 0 ms 384 KB Output is correct
50 Correct 0 ms 384 KB Output is correct
51 Correct 1 ms 384 KB Output is correct
52 Correct 2 ms 384 KB Output is correct
53 Correct 1 ms 384 KB Output is correct
54 Correct 1 ms 384 KB Output is correct
55 Correct 1 ms 384 KB Output is correct
56 Correct 1 ms 384 KB Output is correct
57 Correct 1 ms 384 KB Output is correct
58 Correct 1 ms 384 KB Output is correct
59 Correct 1 ms 384 KB Output is correct
60 Correct 1 ms 384 KB Output is correct
61 Correct 165 ms 10692 KB Output is correct
62 Correct 162 ms 11020 KB Output is correct
63 Correct 137 ms 10616 KB Output is correct
64 Correct 173 ms 11000 KB Output is correct
65 Correct 178 ms 10756 KB Output is correct
66 Correct 171 ms 10876 KB Output is correct
67 Correct 178 ms 10616 KB Output is correct
68 Correct 145 ms 10872 KB Output is correct
69 Correct 129 ms 10616 KB Output is correct
70 Correct 143 ms 10616 KB Output is correct