oj.uz

답안 #856833

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
856833 2023-10-04T17:07:01 Z nnhzzz 바이오칩 (IZhO12_biochips) C++14
100 / 100
 444 ms 400208 KB 
// cre: Nguyen Ngoc Hung - Train VOI 2024 :>

#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 <unordered_set>
#include <sstream>
#include <stack>
#include <stdexcept>
#include <streambuf>
#include <string>
#include <typeinfo>
#include <utility>
#include <valarray>
#include <vector>
#include <cstring>
#include <unordered_map>
#include <cmath>
#include <array>
#include <cassert>
#include <random>

using namespace std;

#define        __nnhzzz__  signed main()
#define          BIT(i,j)  ((i>>j)&1LL)
#define           MASK(i)  (1LL<<i)
#define            ALL(x)  (x).begin(),(x).end()
#define             SZ(x)  (int)(x).size()
#define                fi  first
#define                se  second
#define                ll  long long
#define                vi  vector<int>
#define               vvi  vector<vi>
#define               pii  pair<int,int>
#define              vpii  vector<pii>
#define REPDIS(i,be,en,j)  for(int i = (be); i<=(en); i+=j)
#define     REPD(i,be,en)  for(int i = (be); i>=(en); i--)
#define      REP(i,be,en)  for(int i = (be); i<=(en); i++)
//-------------------------------------------------------------//
const int oo = 1e9,LOG = 20,MAXN = 2e5+7,N = 1e2+3;
const int MOD = 1e9+7,MOD1 = 1e9+207,MOD2 = 1e9+407,MOD3 = 998244353;
//-------------------------------------------------------------//
template<typename T1, typename T2> bool mini(T1 &a, T2 b){if(a>b){a=b;return true;}return false;}
template<typename T1, typename T2> bool maxi(T1 &a, T2 b){if(a<b){a=b;return true;}return false;}
template<typename T> T gcd(T a, T b) { while(b) { a %= b; swap(a,b); } return a; }
template<typename T> T lcm(T a, T b) { return a/gcd(a,b)*b; }

/*
----------------------------------------------------------------
    END OF TEMPLATE
----------------------------------------------------------------
    Nguyen Ngoc Hung - nnhzzz
    Training for VOI24 gold medal
----------------------------------------------------------------
*/

int a[MAXN],dp[MAXN][503];
vi adj[MAXN];
int n,m,root = -1;

void dfs(int u){
    for(const auto &v:adj[u]){
        dfs(v);
        vi tmp(m+1,0);
        REP(i,0,m){
            if(i!=0 && dp[u][i]==0) break;
            REP(j,1,m){
                if(i+j>m || dp[v][j]==0) break;
                maxi(tmp[i+j],dp[u][i]+dp[v][j]);
            }
        }
        REP(i,0,m) maxi(dp[u][i],tmp[i]);
    }
    maxi(dp[u][1],a[u]);
}

void solve(){
    cin >> n >> m;
    REP(i,1,n){
        int par; cin >> par >> a[i];
        if(par==0) root = i;
        else adj[par].push_back(i);
    }
    dfs(root);
    cout << dp[root][m];
}

__nnhzzz__{
    ios::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    #define name "test"
    if(fopen(name".inp","r")){
        freopen(name".inp","r",stdin);
        freopen(name".out","w",stdout);
    }
    #define name1 "nnhzzz"
    if(fopen(name1".inp","r")){
        freopen(name1".inp","r",stdin);
        freopen(name1".out","w",stdout);
    }

    int test = 1;

    while(test--){
      solve();
    }
    cerr << "\nTime elapsed: " << 1000*clock()/CLOCKS_PER_SEC << "ms\n";
    return 0;
}

Compilation message

biochips.cpp: In function 'int main()':
biochips.cpp:114:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  114 |         freopen(name".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
biochips.cpp:115:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  115 |         freopen(name".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
biochips.cpp:119:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  119 |         freopen(name1".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
biochips.cpp:120:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  120 |         freopen(name1".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
100.0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6748 KB Output is correct
2 Correct 1 ms 6760 KB Output is correct
3 Correct 1 ms 6744 KB Output is correct
4 Correct 10 ms 22872 KB Output is correct
5 Correct 12 ms 24924 KB Output is correct
6 Correct 13 ms 24924 KB Output is correct
7 Correct 263 ms 298516 KB Output is correct
8 Correct 266 ms 298540 KB Output is correct
9 Correct 361 ms 362656 KB Output is correct
10 Correct 444 ms 400208 KB Output is correct