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답안 #1028424

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1028424 2024-07-19T20:09:45 Z Lemser Chase (CEOI17_chase) C++14
100 / 100
 301 ms 334932 KB 
#include <bits/stdc++.h>
#pragma GCC optimize("Ofast")
#pragma GCC target("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
#pragma GCC target("popcnt")
#define endl '\n'
#define mp make_pair
#define pb push_back
#define fi first
#define se second
#define fo(i,n) for(auto i =0 ; i < n;i++)
#define fore(i,l,r) for(auto i = l; i < r;i++)
#define forex(i,r,l) for(auto i = r; i >= l; i--)
#define ffo(i,n) forex(i,n-1,0)
#define all(x) x.begin(),x.end()
#define lsb(x) x&(-x)
#define sz(x) (int)x.size()
#define gcd(a,b) __gcd(a,b)
#define vii vector<ii>
#define pq_min(a) priority_queue<a, vector<a>, greater<a>>
#define fls cout.flush()
using namespace std;
using ll = long long;
using ull = unsigned long long;
using vi = vector<ll>;
using ii = pair<ll,ll>;
using mii = map<ll,ll>;
using lld = long double;
void valid(ll in){cout<<((in)?"YES\n":"NO\n");}
const int N = 1e5 + 7,LOG=19;
vi graph[N];
ll n,V,p[N],pact[N],ans,act,ady[N];
ll dp[N][101][2],dp2[N][101][2];
void dfsans(ll u,ll pa=0){
    dp[u][1][1]=ady[u];
    dp2[u][1][1]=ady[u];
    // dp[u][i] ir de cualquier nodo en subarbol de u -> u, soltando i migajas
    // dp2[u][i] ir de u -> cualquier nodo en subarbol de u, soltando i migajas
    for(ll v:graph[u]){
        if(v==pa)continue;
        dfsans(v,u);
        fore(i,1,V+1)
            ans = max({ans, dp[u][i][1]+dp2[v][V-i][1]-p[u],dp[u][i][1]+dp2[v][V-i][0],dp[u][i][0]+dp2[v][V-i][1]-p[u],dp[u][i][0]+dp2[v][V-i][0]});
        fore(i,1,V+1)
            ans = max({ans, dp[v][i][1]+dp2[u][V-i][1]-p[v],dp[v][i][1]+dp2[u][V-i][0],dp[v][i][0]+dp2[u][V-i][1]-p[v],dp[v][i][0]+dp2[u][V-i][0]});
        fore(i,1,V+1){
            // en dp1 mi padre es v
            dp[u][i][1] = max({dp[u][i][1], dp[v][i-1][1]+ady[u]-p[v], dp[v][i-1][0]+ady[u]-p[v]});
            dp[u][i][0] = max({dp[u][i][0], dp[v][i][1], dp[v][i][0]});
            // en dp2 u es el padre de v
            dp2[u][i][1] = max({dp2[u][i][1], dp2[v][i-1][1]+ady[u]-p[u], dp2[v][i-1][0]+ady[u]});
            dp2[u][i][0] = max({dp2[u][i][0], dp2[v][i][1]-p[u], dp2[v][i][0]});
        }
    }
}
void test_case(){
    cin >> n >> V;
    fo(i,n)cin>>p[i+1];
    fo(i,n-1){
        ll a,b;
        cin>>a>>b;
        graph[a].pb(b);
        graph[b].pb(a);
    }
    fore(i,1,n+1)
        for(int v:graph[i])
            ady[i]+=p[v];
    dfsans(1);
    cout<<ans<<endl;
}
int main(){cin.tie(0)->sync_with_stdio(0);
    int t=1;
    // cin >> t;
    while(t--)test_case();
}

Compilation message

chase.cpp:4: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    4 | #pragma GCC optimization ("O3")
      | 
chase.cpp:5: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    5 | #pragma GCC optimization ("unroll-loops")
      |

Subtask #1
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 1 ms 2652 KB Output is correct
5 Correct 1 ms 2652 KB Output is correct
6 Correct 2 ms 2652 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 1 ms 2652 KB Output is correct
5 Correct 1 ms 2652 KB Output is correct
6 Correct 2 ms 2652 KB Output is correct
7 Correct 4 ms 5976 KB Output is correct
8 Correct 3 ms 5980 KB Output is correct
9 Correct 2 ms 5980 KB Output is correct
10 Correct 5 ms 6236 KB Output is correct
11 Correct 3 ms 5980 KB Output is correct
12 Correct 3 ms 5892 KB Output is correct

Subtask #3
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 260 ms 334704 KB Output is correct
2 Correct 255 ms 334676 KB Output is correct
3 Correct 209 ms 325904 KB Output is correct
4 Correct 136 ms 325468 KB Output is correct
5 Correct 251 ms 325560 KB Output is correct
6 Correct 301 ms 325416 KB Output is correct
7 Correct 278 ms 325456 KB Output is correct

Subtask #4
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2652 KB Output is correct
2 Correct 1 ms 2652 KB Output is correct
3 Correct 1 ms 2652 KB Output is correct
4 Correct 1 ms 2652 KB Output is correct
5 Correct 1 ms 2652 KB Output is correct
6 Correct 2 ms 2652 KB Output is correct
7 Correct 4 ms 5976 KB Output is correct
8 Correct 3 ms 5980 KB Output is correct
9 Correct 2 ms 5980 KB Output is correct
10 Correct 5 ms 6236 KB Output is correct
11 Correct 3 ms 5980 KB Output is correct
12 Correct 3 ms 5892 KB Output is correct
13 Correct 260 ms 334704 KB Output is correct
14 Correct 255 ms 334676 KB Output is correct
15 Correct 209 ms 325904 KB Output is correct
16 Correct 136 ms 325468 KB Output is correct
17 Correct 251 ms 325560 KB Output is correct
18 Correct 301 ms 325416 KB Output is correct
19 Correct 278 ms 325456 KB Output is correct
20 Correct 281 ms 325472 KB Output is correct
21 Correct 147 ms 325492 KB Output is correct
22 Correct 269 ms 325636 KB Output is correct
23 Correct 158 ms 325480 KB Output is correct
24 Correct 254 ms 325600 KB Output is correct
25 Correct 208 ms 325316 KB Output is correct
26 Correct 251 ms 334832 KB Output is correct
27 Correct 250 ms 334932 KB Output is correct