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Submission #157200

# Submission time Handle Problem Language Result Execution time Memory
157200 2019-10-10T03:25:16 Z EntityIT 스트랩 (JOI14_straps) C++14
100 / 100
 56 ms 31952 KB 
#include<bits/stdc++.h>

using namespace std;

using LL = long long;
const LL infLL = (LL)1e18 + 123;
const int N = (int)2e3 + 5;

int n;
LL f[N][N];

struct Str {
    int a, b;
    Str(int _a = 0, int _b = 0) : a(_a), b(_b) {}
    bool operator<(const Str &_) const { return a > _.a; }
} str[N];

int main() {
    scanf(" %d", &n);
    for (int i = 1; i <= n; ++i) scanf(" %d %d", &str[i].a, &str[i].b);

    sort(str + 1, str + n + 1);
    for (int i = 0; i < N; ++i) {
        for (int j = 0; j < N; ++j) f[i][j] = -infLL;
    }

    f[0][1] = 0;
    for (int i = 0; i < n; ++i) {
        for (int j = 0; j <= n; ++j) if (f[i][j] > -infLL) {
            f[i + 1][j] = max(f[i + 1][j], f[i][j]);
            if (j) {
                int nJ = j - 1 + str[i + 1].a;
                if (nJ > n) nJ = n;
                f[i + 1][nJ] = max(f[i + 1][nJ], f[i][j] + str[i + 1].b);
            }
        }
    }

    LL ans = -infLL;
    for (int j = 0; j <= n; ++j) ans = max(ans, f[n][j]);

    cout << ans << '\n';

    return 0;
}

Compilation message

straps.cpp: In function 'int main()':
straps.cpp:19:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf(" %d", &n);
     ~~~~~^~~~~~~~~~~
straps.cpp:20:39: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for (int i = 1; i <= n; ++i) scanf(" %d %d", &str[i].a, &str[i].b);
                                  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 31736 KB Output is correct
2 Correct 28 ms 31836 KB Output is correct
3 Correct 28 ms 31812 KB Output is correct
4 Correct 29 ms 31836 KB Output is correct
5 Correct 28 ms 31836 KB Output is correct
6 Correct 33 ms 31736 KB Output is correct
7 Correct 37 ms 31836 KB Output is correct
8 Correct 28 ms 31736 KB Output is correct
9 Correct 33 ms 31736 KB Output is correct
10 Correct 32 ms 31736 KB Output is correct
11 Correct 31 ms 31864 KB Output is correct
12 Correct 28 ms 31912 KB Output is correct
13 Correct 28 ms 31736 KB Output is correct
14 Correct 27 ms 31736 KB Output is correct
15 Correct 27 ms 31736 KB Output is correct
16 Correct 27 ms 31736 KB Output is correct
17 Correct 27 ms 31728 KB Output is correct
18 Correct 27 ms 31736 KB Output is correct
19 Correct 27 ms 31736 KB Output is correct
20 Correct 27 ms 31736 KB Output is correct
21 Correct 34 ms 31736 KB Output is correct
22 Correct 28 ms 31736 KB Output is correct
23 Correct 28 ms 31736 KB Output is correct
24 Correct 28 ms 31736 KB Output is correct
25 Correct 27 ms 31716 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 31864 KB Output is correct
2 Correct 28 ms 31736 KB Output is correct
3 Correct 28 ms 31736 KB Output is correct
4 Correct 28 ms 31736 KB Output is correct
5 Correct 28 ms 31736 KB Output is correct
6 Correct 28 ms 31864 KB Output is correct
7 Correct 28 ms 31864 KB Output is correct
8 Correct 30 ms 31736 KB Output is correct
9 Correct 30 ms 31864 KB Output is correct
10 Correct 30 ms 31736 KB Output is correct
11 Correct 30 ms 31736 KB Output is correct
12 Correct 35 ms 31812 KB Output is correct
13 Correct 35 ms 31736 KB Output is correct
14 Correct 37 ms 31840 KB Output is correct
15 Correct 36 ms 31736 KB Output is correct
16 Correct 36 ms 31736 KB Output is correct
17 Correct 36 ms 31736 KB Output is correct
18 Correct 36 ms 31736 KB Output is correct
19 Correct 45 ms 31736 KB Output is correct
20 Correct 47 ms 31836 KB Output is correct
21 Correct 56 ms 31736 KB Output is correct
22 Correct 39 ms 31736 KB Output is correct
23 Correct 56 ms 31736 KB Output is correct
24 Correct 39 ms 31736 KB Output is correct
25 Correct 54 ms 31736 KB Output is correct
26 Correct 47 ms 31864 KB Output is correct
27 Correct 53 ms 31736 KB Output is correct
28 Correct 44 ms 31736 KB Output is correct
29 Correct 47 ms 31736 KB Output is correct
30 Correct 43 ms 31876 KB Output is correct
31 Correct 42 ms 31736 KB Output is correct

Subtask #3
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 27 ms 31836 KB Output is correct
2 Correct 27 ms 31736 KB Output is correct
3 Correct 28 ms 31736 KB Output is correct
4 Correct 27 ms 31740 KB Output is correct
5 Correct 27 ms 31736 KB Output is correct
6 Correct 28 ms 31736 KB Output is correct
7 Correct 28 ms 31836 KB Output is correct
8 Correct 28 ms 31836 KB Output is correct
9 Correct 31 ms 31736 KB Output is correct
10 Correct 30 ms 31836 KB Output is correct
11 Correct 30 ms 31792 KB Output is correct
12 Correct 31 ms 31736 KB Output is correct
13 Correct 31 ms 31792 KB Output is correct
14 Correct 30 ms 31808 KB Output is correct
15 Correct 30 ms 31736 KB Output is correct
16 Correct 30 ms 31736 KB Output is correct
17 Correct 37 ms 31736 KB Output is correct
18 Correct 37 ms 31736 KB Output is correct
19 Correct 36 ms 31836 KB Output is correct
20 Correct 42 ms 31836 KB Output is correct
21 Correct 38 ms 31736 KB Output is correct
22 Correct 38 ms 31864 KB Output is correct
23 Correct 36 ms 31736 KB Output is correct
24 Correct 35 ms 31736 KB Output is correct
25 Correct 36 ms 31736 KB Output is correct
26 Correct 35 ms 31736 KB Output is correct
27 Correct 35 ms 31736 KB Output is correct
28 Correct 36 ms 31844 KB Output is correct
29 Correct 38 ms 31736 KB Output is correct
30 Correct 36 ms 31736 KB Output is correct
31 Correct 36 ms 31828 KB Output is correct
32 Correct 37 ms 31864 KB Output is correct
33 Correct 36 ms 31836 KB Output is correct

Subtask #4
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 43 ms 31740 KB Output is correct
2 Correct 44 ms 31784 KB Output is correct
3 Correct 46 ms 31736 KB Output is correct
4 Correct 41 ms 31736 KB Output is correct
5 Correct 56 ms 31952 KB Output is correct
6 Correct 55 ms 31736 KB Output is correct
7 Correct 55 ms 31736 KB Output is correct
8 Correct 53 ms 31784 KB Output is correct
9 Correct 54 ms 31740 KB Output is correct
10 Correct 55 ms 31840 KB Output is correct
11 Correct 55 ms 31788 KB Output is correct
12 Correct 54 ms 31776 KB Output is correct
13 Correct 53 ms 31832 KB Output is correct
14 Correct 50 ms 31864 KB Output is correct
15 Correct 54 ms 31836 KB Output is correct
16 Correct 53 ms 31740 KB Output is correct
17 Correct 55 ms 31736 KB Output is correct
18 Correct 55 ms 31736 KB Output is correct
19 Correct 43 ms 31832 KB Output is correct
20 Correct 42 ms 31736 KB Output is correct
21 Correct 43 ms 31864 KB Output is correct
22 Correct 42 ms 31736 KB Output is correct
23 Correct 43 ms 31880 KB Output is correct
24 Correct 42 ms 31736 KB Output is correct
25 Correct 44 ms 31736 KB Output is correct