oj.uz

Submission #83374

# Submission time Handle Problem Language Result Execution time Memory
83374 2018-11-07T12:40:25 Z charlies_moo Dostavljač (COCI18_dostavljac) C++17
14 / 140
 277 ms 2548 KB 
#include <cstdio>
#include <cstring>
#include <vector>
#include <algorithm>

using namespace std;

const int N = 500;
const int M = 500;

typedef vector<int> vi;
int dp1[N][M+1], dp2[N][M+1];

void dfs(vi e[], int a[], int x, int p, int m) {
    for (int i = 1; i <= m; i++) {
    	dp1[x][i] = dp2[x][i] = a[x];
 	}

    for (int i = 0; i < e[x].size(); i++) {
        if (e[x][i] == p) {
            continue;
        }

        dfs(e, a, e[x][i], x, m);
        for (int j = m; j >= 0; j--) {
            for (int k = 0; k <= j - 1; k++) {
            	if (j - k - 2 >= 0) {
            		dp1[x][j] = max(dp1[x][j], dp1[x][j-k-2] + dp1[e[x][i]][k]);
				}
                dp2[x][j] = max(dp2[x][j], dp1[x][j-k-1] + dp2[e[x][i]][k]);
            }
        }
    }
}

int main() {
    int n, m;
    scanf("%d %d", &n, &m);
    int a[n];
    for (int i = 0; i < n; i++) {
        scanf("%d", &a[i]);
    }
    vi e[n];
    for (int i = 0; i < n - 1; i++) {
        int u, v;
        scanf("%d %d", &u, &v);
        u--, v--;
        e[u].push_back(v);
        e[v].push_back(u);
    }
    
    dfs(e, a, 0, -1, m);

    printf("%d\n", dp2[0][m]);

    return 0;
}

Compilation message

dostavljac.cpp: In function 'void dfs(vi*, int*, int, int, int)':
dostavljac.cpp:19:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < e[x].size(); i++) {
                     ~~^~~~~~~~~~~~~
dostavljac.cpp: In function 'int main()':
dostavljac.cpp:38:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &n, &m);
     ~~~~~^~~~~~~~~~~~~~~~~
dostavljac.cpp:41:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &a[i]);
         ~~~~~^~~~~~~~~~~~~
dostavljac.cpp:46:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d", &u, &v);
         ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 500 KB Output isn't correct

Subtask #3
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 708 KB Output isn't correct

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 740 KB Output isn't correct

Subtask #5
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 9 ms 888 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 5 ms 1092 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 62 ms 1392 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 24 ms 1772 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 172 ms 2256 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #10
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 277 ms 2548 KB Output isn't correct
2 Halted 0 ms 0 KB -