제출 #1287106

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1287106		hainam2k9	Dostavljač (COCI18_dostavljac)	C++20	140 / 140	154 ms	2444 KiB

dostavljac

#include <bits/stdc++.h>
#define tt cin.tie(0), cout.tie(0), ios_base::sync_with_stdio(0)
#define fo freopen((NAME+".INP").c_str(), "r", stdin), freopen((NAME+".OUT").c_str(), "w", stdout)
#define ll long long
#define ull unsigned long long
#define i128 __int128
#define db long double
#define sz(a) ((int)(a).size())
#define pb emplace_back
#define pf emplace_front
#define pob pop_back
#define pof pop_front
#define lb lower_bound
#define ub upper_bound
#define fi first
#define se second
#define ins emplace
#define mp make_pair
using namespace std;
const int MOD = 1e9+7, MAXN = 1e5+5;
const string NAME = "";
int n,m,dp[505][505][2],a[505],rs=0;
vector<int> adj[505];
void dfs(int u, int par){
    dp[u][1][0]=dp[u][1][1]=a[u];
    for(int& v : adj[u]){
        if(v==par) continue;
        dfs(v,u);
        for(int i = 1; i<=m; ++i)
            dp[u][i][0]=max(dp[u][i][0],dp[u][i-1][0]), dp[u][i][1]=max(dp[u][i][1],dp[u][i-1][1]);
        for(int i = m; i>=0; --i)
            for(int j = 1; j<=m-i; ++j){
                dp[u][i+j+1][0]=max(dp[u][i+j+1][0],dp[u][i][1]+dp[v][j][0]);
                dp[u][i+j+2][0]=max(dp[u][i+j+2][0],dp[u][i][0]+dp[v][j][1]);
                dp[u][i+j+2][1]=max(dp[u][i+j+2][1],dp[u][i][1]+dp[v][j][1]);
            }
    }
    for(int i = 1; i<=m; ++i)
        dp[u][i][0]=max(dp[u][i][0],dp[u][i-1][0]), dp[u][i][1]=max(dp[u][i][1],dp[u][i-1][1]);
}
int main()
{
    tt;
    if(fopen((NAME + ".INP").c_str(), "r")) fo;
    cin >> n >> m;
    for(int i = 1; i<=n; ++i)
        cin >> a[i];
    for(int i = 1; i<n; ++i){
        int x,y;
        cin >> x >> y;
        adj[x].pb(y), adj[y].pb(x);
    }
    dfs(1,0);
    cout << max(dp[1][m][0],dp[1][m][1]);
}

컴파일 시 표준 에러 (stderr) 메시지

dostavljac.cpp: In function 'int main()':
dostavljac.cpp:3:19: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    3 | #define fo freopen((NAME+".INP").c_str(), "r", stdin), freopen((NAME+".OUT").c_str(), "w", stdout)
      |            ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
dostavljac.cpp:44:45: note: in expansion of macro 'fo'
   44 |     if(fopen((NAME + ".INP").c_str(), "r")) fo;
      |                                             ^~
dostavljac.cpp:3:63: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    3 | #define fo freopen((NAME+".INP").c_str(), "r", stdin), freopen((NAME+".OUT").c_str(), "w", stdout)
      |                                                        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
dostavljac.cpp:44:45: note: in expansion of macro 'fo'
   44 |     if(fopen((NAME + ".INP").c_str(), "r")) fo;
      |                                             ^~

• Subtask 1: 14 / 14
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• Subtask 3: 14 / 14
• Subtask 4: 14 / 14
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• Subtask 10: 14 / 14