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답안 #1036459

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1036459 2024-07-27T11:44:58 Z MarwenElarbi Chase (CEOI17_chase) C++17
100 / 100
 166 ms 180560 KB 
#include <bits/stdc++.h>
#define vi vector<int>
#define ve vector
#define ll long long
#define vl vector<ll>
#define vll vector<pair<ll,ll>>
#define onbit __builtin_popcount
#define ii pair<int,int>
#define vvi vector<vi>
#define vii vector<ii>
#define gii greater<ii>
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define INF 1e18
#define eps 1e-7
#define eps1 1e-2
#define optimise ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
#define MAX_A 1e5+5
using namespace std;
const int MOD = 1e9+7;
const int nax = 2e5+5;
const int MAX_VAL = 1e6;
double PI=3.14159265359;
int arx[8]={1,1,0,-1,-1,-1, 0, 1};
int ary[8]={0,1,1, 1, 0,-1,-1,-1};
typedef complex<int> Point;
#define X real()
#define Y imag()
void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}
vector<int> adj[nax];
ll sum[nax];
int tab[nax];
ll dp[nax][102][2];
ll cur[102][2];
int n,k;
ll ans;
void dfs(int x,int p){
    dp[x][1][0]=sum[x];
    for(auto u:adj[x]){
        if(u==p) continue;
        dfs(u,x);
        for (int i = 1; i <= k; ++i)
        {
            ll down=max(dp[u][i][0],dp[u][i-1][0]+sum[x]-tab[u]);
            ll up=max(dp[u][i][1],dp[u][i-1][1]+sum[u]-tab[x]);
            cur[i][0]=down;
            cur[i][1]=up;
            if(i!=k){
                ans=max(ans,max(dp[x][k-i][0]+up,dp[x][k-i][1]+down));
                ans=max(ans,dp[u][i][1]+sum[x]);
            }
        }
        for (int i = 1; i <= k; ++i)
        {
            dp[x][i][0]=max(dp[x][i][0],cur[i][0]);
            dp[x][i][1]=max(dp[x][i][1],cur[i][1]);
            ans=max(ans,dp[x][i][0]);
        }
    }
    return;
}
int main(){
    optimise;
    //setIO("closing");
    cin>>n>>k;
    for (int i = 0; i < n; ++i)
    {
        cin>>tab[i];
    }
    for (int i = 0; i < n-1; ++i)
    {
        int x,y;
        cin>>x>>y;
        x--;y--;
        sum[x]+=tab[y];
        sum[y]+=tab[x];
        adj[x].pb(y);
        adj[y].pb(x);
    }
    if(!k){
        cout << 0<<endl;
        return 0;
    }
    dfs(0,-1);
    cout <<ans<<endl;
}

Compilation message

chase.cpp: In function 'void setIO(std::string)':
chase.cpp:32:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
chase.cpp:33:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 8536 KB Output is correct
2 Correct 1 ms 8540 KB Output is correct
3 Correct 1 ms 8540 KB Output is correct
4 Correct 1 ms 8540 KB Output is correct
5 Correct 2 ms 8536 KB Output is correct
6 Correct 1 ms 8540 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 8536 KB Output is correct
2 Correct 1 ms 8540 KB Output is correct
3 Correct 1 ms 8540 KB Output is correct
4 Correct 1 ms 8540 KB Output is correct
5 Correct 2 ms 8536 KB Output is correct
6 Correct 1 ms 8540 KB Output is correct
7 Correct 2 ms 10840 KB Output is correct
8 Correct 2 ms 10844 KB Output is correct
9 Correct 2 ms 10844 KB Output is correct
10 Correct 3 ms 10844 KB Output is correct
11 Correct 2 ms 10844 KB Output is correct
12 Correct 2 ms 10844 KB Output is correct

Subtask #3
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 159 ms 180560 KB Output is correct
2 Correct 157 ms 180560 KB Output is correct
3 Correct 122 ms 173768 KB Output is correct
4 Correct 96 ms 173392 KB Output is correct
5 Correct 166 ms 173396 KB Output is correct
6 Correct 152 ms 173392 KB Output is correct
7 Correct 150 ms 173396 KB Output is correct

Subtask #4
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 8536 KB Output is correct
2 Correct 1 ms 8540 KB Output is correct
3 Correct 1 ms 8540 KB Output is correct
4 Correct 1 ms 8540 KB Output is correct
5 Correct 2 ms 8536 KB Output is correct
6 Correct 1 ms 8540 KB Output is correct
7 Correct 2 ms 10840 KB Output is correct
8 Correct 2 ms 10844 KB Output is correct
9 Correct 2 ms 10844 KB Output is correct
10 Correct 3 ms 10844 KB Output is correct
11 Correct 2 ms 10844 KB Output is correct
12 Correct 2 ms 10844 KB Output is correct
13 Correct 159 ms 180560 KB Output is correct
14 Correct 157 ms 180560 KB Output is correct
15 Correct 122 ms 173768 KB Output is correct
16 Correct 96 ms 173392 KB Output is correct
17 Correct 166 ms 173396 KB Output is correct
18 Correct 152 ms 173392 KB Output is correct
19 Correct 150 ms 173396 KB Output is correct
20 Correct 159 ms 173488 KB Output is correct
21 Correct 25 ms 13916 KB Output is correct
22 Correct 151 ms 173592 KB Output is correct
23 Correct 90 ms 173468 KB Output is correct
24 Correct 147 ms 173468 KB Output is correct
25 Correct 122 ms 173516 KB Output is correct
26 Correct 142 ms 180560 KB Output is correct
27 Correct 136 ms 180476 KB Output is correct