oj.uz

Submission #369149

# Submission time Handle Problem Language Result Execution time Memory
369149 2021-02-20T14:37:34 Z BartolM Beads and wires (APIO14_beads) C++17
13 / 100
 1000 ms 492 KB 
#include <bits/stdc++.h>

using namespace std;

#define X first
#define Y second
#define mp make_pair
#define pb push_back
typedef long long ll;
typedef pair <int, int> pii;
typedef pair <int, pii> pip;
typedef pair <pii, int> ppi;
typedef pair <ll, ll> pll;

const int INF=0x3f3f3f3f;
const ll MAX=(ll)INF*INF;
const int N=205;

int n;
vector <pii> ls[N];
int dp[N][2];

int rek(int node, int fl, int par) {
    int ret=dp[node][fl];
    if (ret!=-1) return ret;

    int sum0=0, ed;
    for (pii sus:ls[node]) {
        if (sus.X==par) {
            ed=sus.Y;
            continue;
        }
        sum0+=rek(sus.X, 0, node);
    }
    ret=sum0;
    for (pii sus:ls[node]) {
        if (sus.X==par) continue;
        if (!fl) ret=max(ret, ed+sus.Y+sum0-rek(sus.X, 0, node)+rek(sus.X, 1, node));
    }
    return ret;
}

void load() {
    scanf("%d", &n);
    for (int i=0; i<n-1; ++i) {
        int a, b, c;
        scanf("%d %d %d", &a, &b, &c);
        ls[a].pb(mp(b, c));
        ls[b].pb(mp(a, c));
    }
}

int main() {
    load();
    int sol=0;
    for (int i=1; i<=n; ++i) {
        memset(dp, -1, sizeof dp);
        sol=max(sol, rek(i, 1, 0));
    }
    printf("%d\n", sol);
    return 0;
}

Compilation message

beads.cpp: In function 'void load()':
beads.cpp:44:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   44 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
beads.cpp:47:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   47 |         scanf("%d %d %d", &a, &b, &c);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
beads.cpp: In function 'int rek(int, int, int)':
beads.cpp:38:33: warning: 'ed' may be used uninitialized in this function [-Wmaybe-uninitialized]
   38 |         if (!fl) ret=max(ret, ed+sus.Y+sum0-rek(sus.X, 0, node)+rek(sus.X, 1, node));
      |                                 ^

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct

Subtask #2
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 32 ms 380 KB Output is correct
14 Correct 101 ms 364 KB Output is correct
15 Correct 25 ms 364 KB Output is correct
16 Correct 630 ms 364 KB Output is correct
17 Correct 671 ms 492 KB Output is correct
18 Execution timed out 1090 ms 364 KB Time limit exceeded
19 Halted 0 ms 0 KB -

Subtask #3
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 32 ms 380 KB Output is correct
14 Correct 101 ms 364 KB Output is correct
15 Correct 25 ms 364 KB Output is correct
16 Correct 630 ms 364 KB Output is correct
17 Correct 671 ms 492 KB Output is correct
18 Execution timed out 1090 ms 364 KB Time limit exceeded
19 Halted 0 ms 0 KB -

Subtask #4
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 32 ms 380 KB Output is correct
14 Correct 101 ms 364 KB Output is correct
15 Correct 25 ms 364 KB Output is correct
16 Correct 630 ms 364 KB Output is correct
17 Correct 671 ms 492 KB Output is correct
18 Execution timed out 1090 ms 364 KB Time limit exceeded
19 Halted 0 ms 0 KB -