oj.uz

Submission #158573

# Submission time Handle Problem Language Result Execution time Memory
158573 2019-10-17T23:53:57 Z thecodingwizard Museum (CEOI17_museum) C++11
100 / 100
 2137 ms 395888 KB 
//#pragma GCC optimize ("O3")
//#pragma GCC target ("sse4")

#include <bits/stdc++.h>

using namespace std;

template<class T> using min_heap = priority_queue<T, vector<T>, greater<T>>;

#define FOR(i, a, b) for (int i=a; i<(b); i++)
#define F0R(i, a) for (int i=0; i<(a); i++)
#define F0R1(i, a) for (int i=1; i<=(a); i++)
#define FORd(i, a, b) for (int i = (b)-1; i >= a; i--)
#define F0Rd(i, a) for (int i = (a)-1; i >= 0; i--)
#define trav(a, x) for (auto& a : x)
#define MIN(a, b) a = min(a, b)
#define MAX(a, b) a = max(a, b)

#define INF 1000000010
#define LL_INF 4500000000000000000LL
#define LSOne(S) (S & (-S))
#define EPS 1e-9
#define pA first
#define pB second
#define mp make_pair
#define mt make_tuple
#define pb push_back
#define eb emplace_back
#define PI acos(-1.0)
// #define MOD (int)(2e+9+11)
#define MOD (int)(1e+9+7)
#define SET(vec, val, size) for (int i = 0; i < size; i++) vec[i] = val;
#define SET2D(arr, val, dim1, dim2) F0R(i, dim1) F0R(j, dim2) arr[i][j] = val;
#define SET3D(arr, val, dim1, dim2, dim3) F0R(i, dim1) F0R(j, dim2) F0R(k, dim3) arr[i][j][k] = val;
#define SET4D(arr, val, dim1, dim2, dim3, dim4) F0R(i, dim1) F0R(j, dim2) F0R(k, dim3) F0R(l, dim4) arr[i][j][k][l] = val;

#define lb lower_bound
#define ub upper_bound
#define sz(x) (int)x.size()
#define beg(x) x.begin()
#define en(x) x.end()
#define all(x) beg(x), en(x)
#define resz resize
#define SORT(vec) sort(all(vec))
#define RSORT(vec) sort(vec.rbegin(),vec.rend())

typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
typedef pair<int, int> ii;
typedef pair<int, ii> iii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<iii> viii;
typedef vector<ll> vl;

// @formatter:off
// Source: Benq (https://github.com/bqi343/USACO) [Modified]
namespace input {
    template<class T> void re(complex<T>& x);
    template<class T1, class T2> void re(pair<T1,T2>& p);
    template<class T> void re(vector<T>& a);
    template<class T, size_t SZ> void re(array<T,SZ>& a);
    template<class T> void reA(T A[], int sz);

    template<class T> void re(T& x) { cin >> x; }
    void re(double& x) { string t; re(t); x = stod(t); }
    void re(ld& x) { string t; re(t); x = stold(t); }
    template<class Arg, class... Args> void re(Arg& first, Args&... rest) {
        re(first); re(rest...);
    }

    template<class T1, class T2> void re(pair<T1,T2>& p) { re(p.pA,p.pB); }
    template<class T> void re(vector<T>& a) { F0R(i,sz(a)) re(a[i]); }
    template<class T, size_t SZ> void re(array<T,SZ>& a) { F0R(i,SZ) re(a[i]); }
    template<class T> void reA(T A[], int sz) { F0R(i, sz) re(A[i]); }

    void setupIO(const string &PROB = "") {
        ios::sync_with_stdio(false);
        cin.tie(nullptr);
        if (PROB.length() != 0) {
            ifstream infile(PROB + ".in");
            if (infile.good()) {
                freopen((PROB + ".in").c_str(), "r", stdin);
                freopen((PROB + ".out").c_str(), "w", stdout);
            }
        }
    }
}
using namespace input;

namespace output {
    template<class T1, class T2> void prD(const pair<T1,T2>& x);
    template<class T, size_t SZ> void prD(const array<T,SZ>& x);
    template<class T> void prD(const vector<T>& x);
    template<class T> void prD(const set<T>& x);
    template<class T1, class T2> void prD(const map<T1,T2>& x);

    template<class T1, class T2> void pr(const pair<T1,T2>& x);
    template<class T, size_t SZ> void pr(const array<T,SZ>& x);
    template<class T> void pr(const vector<T>& x);
    template<class T> void pr(const set<T>& x);
    template<class T1, class T2> void pr(const map<T1,T2>& x);

    template<class T> void prD(const T& x) { cout << x; }
    template<class Arg, class... Args> void prD(const Arg& first, const Args&... rest) {
        prD(first); prD(rest...);
    }

    template<class T1, class T2> void prD(const pair<T1,T2>& x) {
        prD("{",x.pA,", ",x.pB,"}");
    }
    template<class T> void prDContain(const T& x) {
        prD("{");
        bool fst = 1; for (const auto& a: x) prD(!fst?", ":"",a), fst = 0; // const needed for vector<bool>
        prD("}");
    }
    template<class T, size_t SZ> void prD(const array<T,SZ>& x) { prDContain(x); }
    template<class T> void prD(const vector<T>& x) { prDContain(x); }
    template<class T> void prD(const set<T>& x) { prDContain(x); }
    template<class T1, class T2> void prD(const map<T1,T2>& x) { prDContain(x); }

    void psD() { prD("\n"); }
    template<class Arg> void psD(const Arg& first) {
        prD(first); psD(); // no space at end of line
    }
    template<class Arg, class... Args> void psD(const Arg& first, const Args&... rest) {
        prD(first," "); psD(rest...); // print w/ spaces
    }


    template<class T> void pr(const T& x) { cout << x; }
    template<class Arg, class... Args> void pr(const Arg& first, const Args&... rest) {
        pr(first); pr(rest...);
    }

    template<class T1, class T2> void pr(const pair<T1,T2>& x) {
        pr(x.pA, " ", x.pB);
    }
    template<class T> void prContain(const T& x) {
        bool fst = 1; for (const auto& a: x) pr(!fst?" ":"",a), fst = 0; // const needed for vector<bool>
    }
    template<class T, size_t SZ> void pr(const array<T,SZ>& x) { prContain(x); }
    template<class T> void pr(const vector<T>& x) { prContain(x); }
    template<class T> void pr(const set<T>& x) { prContain(x); }
    template<class T1, class T2> void pr(const map<T1,T2>& x) { prContain(x); }

    void ps() { pr("\n"); }
    template<class Arg> void ps(const Arg& first) {
        pr(first); ps(); // no space at end of line
    }
    template<class Arg, class... Args> void ps(const Arg& first, const Args&... rest) {
        pr(first," "); ps(rest...); // print w/ spaces
    }
}
using namespace output;
// @formatter:on

/* ============================ */

int n, k, x;
vii adj2[10000];
vii adj[10000];
int childCt[10000];
vi childCt2[10000];

int dfs(int u, int p) {
    childCt[u] = 1;
    trav(x, adj2[u]) {
        if (x.pA == p) continue;
        adj[u].pb(x);
        int numC = dfs(x.pA, u);
        childCt[u] += numC;
        childCt2[u].pb(numC);
    }
    F0R(i, sz(childCt2[u])) {
        FOR(j, i+1, sz(childCt2[u])) {
            childCt2[u][i] += childCt2[u][j];
        }
    }
    return childCt[u];
}

vector<vi> memo[10000][2];
int dp(int u, int k, int ret, int idx) {
    if (k == 0) return 0;
    if (k > childCt2[u][idx]) return INF;
    if (idx == sz(adj[u]) - 1) {
        if (ret == 0) return dp(adj[u][idx].pA, k-1, 0, 0) + adj[u][idx].pB;
        return dp(adj[u][idx].pA, k-1, ret, 0) + adj[u][idx].pB*2;
    }
    if (sz(memo[u][ret]) == 0) {
        F0R(i, sz(adj[u])) {
            memo[u][ret].eb(childCt2[u][i] + 1, -1);
        }
    }
    if (memo[u][ret][idx][k] != -1) return memo[u][ret][idx][k];

    // if ret = 0, then we can still avoid returning to parent for one child
    int best = INF;
    MIN(best, dp(u, k, ret, idx+1));
    FOR(i, max(1, k - childCt2[u][idx+1]),min(k, childCt[adj[u][idx].pA]) + 1) {
        MIN(best, dp(u, k - i, ret, idx + 1) + dp(adj[u][idx].pA, i-1, 1, 0) + adj[u][idx].pB*2);
        if (ret == 0) MIN(best, dp(u, k - i, 1, idx + 1) + dp(adj[u][idx].pA, i-1, 0, 0) + adj[u][idx].pB);
    }
    return memo[u][ret][idx][k] = best;
}

int main() {
    setupIO();

    re(n, k, x);
    F0R(i, n-1) {
        int a, b, c; re(a, b, c);
        adj2[--a].pb(mp(--b, c));
        adj2[b].pb(mp(a, c));
    }
    dfs(x-1, x-1);

    ps(dp(x-1, k-1, 0, 0));

    return 0;
}

Compilation message

museum.cpp: In function 'void input::setupIO(const string&)':
museum.cpp:85:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
                 freopen((PROB + ".in").c_str(), "r", stdin);
                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
museum.cpp:86:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
                 freopen((PROB + ".out").c_str(), "w", stdout);
                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1528 KB Output is correct
2 Correct 3 ms 1528 KB Output is correct
3 Correct 3 ms 1528 KB Output is correct
4 Correct 3 ms 1528 KB Output is correct
5 Correct 3 ms 1528 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 102 ms 5624 KB Output is correct
2 Correct 99 ms 5664 KB Output is correct
3 Correct 21 ms 9720 KB Output is correct
4 Correct 21 ms 8952 KB Output is correct
5 Correct 34 ms 8696 KB Output is correct

Subtask #3
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 102 ms 5624 KB Output is correct
2 Correct 99 ms 5664 KB Output is correct
3 Correct 21 ms 9720 KB Output is correct
4 Correct 21 ms 8952 KB Output is correct
5 Correct 34 ms 8696 KB Output is correct
6 Correct 92 ms 6136 KB Output is correct
7 Correct 19 ms 8184 KB Output is correct
8 Correct 511 ms 395888 KB Output is correct
9 Correct 342 ms 160120 KB Output is correct
10 Correct 167 ms 46200 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1528 KB Output is correct
2 Correct 3 ms 1528 KB Output is correct
3 Correct 3 ms 1528 KB Output is correct
4 Correct 3 ms 1528 KB Output is correct
5 Correct 3 ms 1528 KB Output is correct
6 Correct 102 ms 5624 KB Output is correct
7 Correct 99 ms 5664 KB Output is correct
8 Correct 21 ms 9720 KB Output is correct
9 Correct 21 ms 8952 KB Output is correct
10 Correct 34 ms 8696 KB Output is correct
11 Correct 92 ms 6136 KB Output is correct
12 Correct 19 ms 8184 KB Output is correct
13 Correct 511 ms 395888 KB Output is correct
14 Correct 342 ms 160120 KB Output is correct
15 Correct 167 ms 46200 KB Output is correct
16 Correct 799 ms 6308 KB Output is correct
17 Correct 2111 ms 6128 KB Output is correct
18 Correct 627 ms 43196 KB Output is correct
19 Correct 1830 ms 308500 KB Output is correct
20 Correct 656 ms 22464 KB Output is correct
21 Correct 2084 ms 65344 KB Output is correct
22 Correct 797 ms 6096 KB Output is correct
23 Correct 1924 ms 309476 KB Output is correct
24 Correct 669 ms 17900 KB Output is correct
25 Correct 2137 ms 102304 KB Output is correct