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Submission #128167

# Submission time Handle Problem Language Result Execution time Memory
128167 2019-07-10T13:29:41 Z srvlt Fireworks (APIO16_fireworks) C++14
19 / 100
 22 ms 1272 KB 
#include <bits/stdc++.h>
#define ll long long
#define db long double
#define pb push_back
#define ppb pop_back
#define fi first
#define se second
#define mp make_pair
#define endl "\n"
#define int long long
using namespace std;

const int N = 300, inf = 2e18;
int n, m, dp[N + 3][N + 3];
vector <pair <int, int> > q[N + 3];

void dfs(int v, int p) {
    for (auto i : q[v]) {
        int to = i.fi, w = i.se;
        if (to == p) {
            continue;
        }
        dfs(to, v);
    }
    for (int i = 0; i <= N; i++) {
        int res = 0;
        for (auto j : q[v]) {
            int to = j.fi, w = j.se;
            if (to == p) {
                continue;
            }
            int x = inf;
            for (int k = 0; k <= i; k++) {
                x = min(x, dp[to][i - k] + abs(k - w));
            }
            res += x;
        }
        if (q[v].size() == 1 && v != 1) {
            dp[v][i] = i;
        }   else {
            dp[v][i] = res;
        }
    }
}

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cin>>n>>m;
    for (int i = 2; i <= n + m; i++) {
        int x, y;
        cin>>x>>y;
        q[x].pb({i, y});
        q[i].pb({x, y});
    }
    if (n + m == 2) {
        return cout<<0, 0;
    }
    for (int i = 0; i <= N; i++) {
        for (int j = 0; j <= N; j++) {
            dp[i][j] = inf;
        }
    }
    dfs(1, 1);
    int ans = inf;
    for (int i = 0; i <= N; i++) {
        ans = min(ans, dp[1][i]);
    }
    cout<<ans;
}

Compilation message

fireworks.cpp: In function 'void dfs(long long int, long long int)':
fireworks.cpp:19:24: warning: unused variable 'w' [-Wunused-variable]
         int to = i.fi, w = i.se;
                        ^

Subtask #1
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Incorrect 3 ms 1016 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 1144 KB Output is correct
2 Correct 5 ms 1016 KB Output is correct
3 Correct 6 ms 1016 KB Output is correct
4 Correct 9 ms 1144 KB Output is correct
5 Correct 10 ms 1016 KB Output is correct
6 Correct 11 ms 1144 KB Output is correct
7 Correct 12 ms 1144 KB Output is correct
8 Correct 14 ms 1016 KB Output is correct
9 Correct 15 ms 1144 KB Output is correct
10 Correct 16 ms 1144 KB Output is correct
11 Correct 18 ms 1144 KB Output is correct
12 Correct 19 ms 1016 KB Output is correct
13 Correct 20 ms 1272 KB Output is correct
14 Correct 22 ms 1144 KB Output is correct
15 Correct 22 ms 1144 KB Output is correct
16 Correct 22 ms 1144 KB Output is correct
17 Correct 22 ms 1144 KB Output is correct
18 Correct 22 ms 1144 KB Output is correct
19 Correct 22 ms 1016 KB Output is correct

Subtask #3
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Incorrect 3 ms 1016 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Incorrect 3 ms 1016 KB Output isn't correct
3 Halted 0 ms 0 KB -