oj.uz

답안 #886367

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
886367 2023-12-12T01:06:32 Z Kutan Museum (CEOI17_museum) C++14
80 / 100
 11 ms 17500 KB 
// Cao Quang Hung
#include <cassert>
#include <cctype>
#include <cerrno>
#include <cfloat>
#include <ciso646>
#include <climits>
#include <clocale>
#include <cmath>
#include <csetjmp>
#include <csignal>
#include <cstdarg>
#include <cstddef>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <ccomplex>
#include <cfenv>
#include <cinttypes>
#include <cstdbool>
#include <cstdint>
#include <ctgmath>
#include <cwchar>
#include <cwctype>
#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <exception>
#include <fstream>
#include <functional>
#include <iomanip>
#include <ios>
#include <iosfwd>
#include <iostream>
#include <istream>
#include <iterator>
#include <limits>
#include <list>
#include <locale>
#include <map>
#include <memory>
#include <new>
#include <numeric>
#include <ostream>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <stdexcept>
#include <streambuf>
#include <string>
#include <typeinfo>
#include <utility>
#include <valarray>
#include <vector>
#include <array>
#include <atomic>
#include <chrono>
#include <condition_variable>
#include <forward_list>
#include <future>
#include <initializer_list>
#include <mutex>
#include <random>
#include <ratio>
#include <regex>
#include <scoped_allocator>
#include <system_error>
#include <thread>
#include <tuple>
#include <typeindex>
#include <type_traits>
#include <unordered_map>
#include <unordered_set>
 
using namespace std;
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define pii pair<int,int>
#define pll pair<long long , long long>
#define vi vector<int>
#define vpii vector<pii>
#define SZ(x) ((int)(x.size()))
#define fi first
#define se second
#define IN(x,y) ((y).find((x))!=(y).end())
#define ALL(t) t.begin(),t.end()
#define FOREACH(i,t) for (typeof(t.begin()) i=t.begin(); i!=t.end(); i++)
#define REP(i,a,b) for(int (i)=(a);(i)<=(b);++i)
#define REPD(i,a,b) for(int (i)=(a); (i)>=(b);--i)
#define FOR(i, n) for (int (i) = 0; (i) < (n); ++(i))
#define dem(x) __builtin_popcount(x)
#define Mask(x) (1LL << (x))
#define BIT(x, i) ((x) >> (i) & 1)
#define ln '\n'
#define io_faster ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
///mt19937 rnd(time(0));
 
const int INF = 1e9 , mod = 1e9 + 7;
 
template <class T1, class T2>
inline T1 mul(T1& x, const T2 &k){ return x = (1LL * x * k) % mod; }
 
template <class T1 , class T2>
inline T1 pw(T1 x, T2 k){T1 res = 1; for (; k ; k >>= 1){ if (k & 1) mul(res, x); mul(x, x); } return res;}
 
template <class T>
inline bool minimize(T &x, const T &y){ if (x > y){x = y; return 1;} return 0; }
 
template <class T>
inline bool maximize(T &x, const T &y){ if (x < y){x = y; return 1;} return 0; }
 
template <class T>
inline void add(T &x , const T &y){ if ((x += y) >= mod) x -= mod; }
 
template <class T>
inline T product (const T &x , const T &y) { return 1LL * x * y % mod; }
 
#define PROB "a"
void file(){
    if(fopen(PROB".inp", "r")){
        freopen(PROB".inp","r",stdin);
        freopen(PROB".out","w",stdout);
    }
}
void sinh_(){
//    srand(time(0));
//    freopen(PROB".inp" , "w" , stdout);
//    int n;
}
 
typedef long long ll;
typedef double db;
const int N = 1e4 + 5;
 
int n, k, x;
vpii adj[N];
 
void readip(){
    cin >> n >> k >> x;
    REP(i, 2, n) {
        int u, v, w; cin >> u >> v >> w;
        adj[u].eb(v, w);
        adj[v].eb(u, w);
    }
}
 
namespace sub3 {
    ll dp[N][102][2] = {}, g[102][2];
    int sz[N];
 
    void dfs_tree(int u, int p) {
        sz[u] = 0;
        dp[u][0][0] = dp[u][0][1] = 0;
 
        for (const auto &[v, w] : adj[u]) if (v != p) {
            dfs_tree(v, u);
 
            REP(i, 0, min(k, sz[u] + sz[v])) FOR(t, 2) g[i][t] = 1e18;
            
            for (int ku = 0; ku <= min(k, sz[u]); ku++) for (int kv = 1; kv <= min(sz[v], k - ku); ++kv)  {
                minimize(g[ku + kv][0], dp[u][ku][0] + dp[v][kv][0] + 2 * w);
                minimize(g[ku + kv][1], min(dp[u][ku][0] + dp[v][kv][1] + w, dp[u][ku][1] + dp[v][kv][0] + 2 * w));
            }
 
            sz[u] += sz[v];
 
            for (int i = 0; i <= min(k, sz[u]); ++i) FOR(t, 2)
                minimize(dp[u][i][t] , g[i][t]);
        }
 
        sz[u]++;
        for (int i = min(k, sz[u]); i > 0; --i) {
            dp[u][i][0] = dp[u][i - 1][0];
            dp[u][i][1] = dp[u][i - 1][1];
        } 
        dp[u][0][0] = dp[u][0][1] = dp[u][1][0] = dp[u][1][1] = 0;  
    }
 
    void solve() {
        memset(dp, 0x3f, sizeof dp);
        dfs_tree(x, -1);
        cout << min(dp[x][k][1], dp[x][k][0]) << ln;
    }
};
 
void solve(){   
    if (k <= 100) {
        sub3::solve();
        return;
    }
}
 
int main(){
    sinh_();
    io_faster
    file();
    int t = 1;
//    cin >> t;
    while (t--){
        readip();
        solve();
    }
}

Compilation message

museum.cpp: In function 'void readip()':
museum.cpp:92:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   92 | #define REP(i,a,b) for(int (i)=(a);(i)<=(b);++i)
      |                            ^
museum.cpp:144:5: note: in expansion of macro 'REP'
  144 |     REP(i, 2, n) {
      |     ^~~
museum.cpp: In function 'void sub3::dfs_tree(int, int)':
museum.cpp:159:26: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  159 |         for (const auto &[v, w] : adj[u]) if (v != p) {
      |                          ^
museum.cpp:92:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   92 | #define REP(i,a,b) for(int (i)=(a);(i)<=(b);++i)
      |                            ^
museum.cpp:162:13: note: in expansion of macro 'REP'
  162 |             REP(i, 0, min(k, sz[u] + sz[v])) FOR(t, 2) g[i][t] = 1e18;
      |             ^~~
museum.cpp:94:28: warning: unnecessary parentheses in declaration of 't' [-Wparentheses]
   94 | #define FOR(i, n) for (int (i) = 0; (i) < (n); ++(i))
      |                            ^
museum.cpp:162:46: note: in expansion of macro 'FOR'
  162 |             REP(i, 0, min(k, sz[u] + sz[v])) FOR(t, 2) g[i][t] = 1e18;
      |                                              ^~~
museum.cpp:94:28: warning: unnecessary parentheses in declaration of 't' [-Wparentheses]
   94 | #define FOR(i, n) for (int (i) = 0; (i) < (n); ++(i))
      |                            ^
museum.cpp:171:54: note: in expansion of macro 'FOR'
  171 |             for (int i = 0; i <= min(k, sz[u]); ++i) FOR(t, 2)
      |                                                      ^~~
museum.cpp: In function 'void file()':
museum.cpp:125:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  125 |         freopen(PROB".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
museum.cpp:126:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  126 |         freopen(PROB".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 16472 KB Output is correct
2 Correct 3 ms 16468 KB Output is correct
3 Correct 3 ms 16476 KB Output is correct
4 Correct 3 ms 16476 KB Output is correct
5 Correct 3 ms 16472 KB Output is correct

Subtask #2
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 16984 KB Output is correct
2 Correct 9 ms 16988 KB Output is correct
3 Correct 10 ms 17500 KB Output is correct
4 Correct 10 ms 17200 KB Output is correct
5 Correct 10 ms 17112 KB Output is correct

Subtask #3
35.0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 16984 KB Output is correct
2 Correct 9 ms 16988 KB Output is correct
3 Correct 10 ms 17500 KB Output is correct
4 Correct 10 ms 17200 KB Output is correct
5 Correct 10 ms 17112 KB Output is correct
6 Correct 9 ms 16984 KB Output is correct
7 Correct 10 ms 17244 KB Output is correct
8 Correct 10 ms 16988 KB Output is correct
9 Correct 11 ms 16988 KB Output is correct
10 Correct 9 ms 16984 KB Output is correct

Subtask #4
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 16472 KB Output is correct
2 Correct 3 ms 16468 KB Output is correct
3 Correct 3 ms 16476 KB Output is correct
4 Correct 3 ms 16476 KB Output is correct
5 Correct 3 ms 16472 KB Output is correct
6 Correct 9 ms 16984 KB Output is correct
7 Correct 9 ms 16988 KB Output is correct
8 Correct 10 ms 17500 KB Output is correct
9 Correct 10 ms 17200 KB Output is correct
10 Correct 10 ms 17112 KB Output is correct
11 Correct 9 ms 16984 KB Output is correct
12 Correct 10 ms 17244 KB Output is correct
13 Correct 10 ms 16988 KB Output is correct
14 Correct 11 ms 16988 KB Output is correct
15 Correct 9 ms 16984 KB Output is correct
16 Incorrect 3 ms 856 KB Output isn't correct
17 Halted 0 ms 0 KB -