Submission #1197342

#	Time	Username	Problem	Language	Result	Execution time	Memory
1197342		Captain_Georgia	Power Plant (JOI20_power)	C++20	47 / 100	1594 ms	12504 KiB

power

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;

int32_t main () {

    ios_base::sync_with_stdio(0); 
    cin.tie(0); 
    cout.tie(0); 

    int N;
    cin >> N;
    vector<int> g[N];
    for (int i = 1;i < N;i ++) {
        int u, v;
        cin >> u >> v;
        -- u; -- v;
        g[u].push_back(v);
        g[v].push_back(u);
    }
    string S;
    cin >> S;

    int mx = 0;
    for (int i = 0;i < N;i ++) {
        vector<int> dp(N, 0);
        function<void(int, int)> dfs = [&](int si, int pi) -> void {
            int tmp = 0;
            for (auto ti : g[si]) if (ti != pi) {
                dfs(ti, si);
                tmp += dp[ti];
            }
            if (g[i].size() == 1 && si == i) {
                dp[si] = max(S[si] - '0', tmp + (S[si] - '0'));
            } else {
                dp[si] = max(S[si] - '0', tmp - (S[si] - '0'));
            }
        };
        dfs(i, i);
        mx = max(mx, dp[i]);
    }
    cout << mx << "\n";
}

• Subtask 1: 6 / 6
• Subtask 2: 41 / 41
• Subtask 3: 0 / 53