Submission #660854

#	Time	Username	Problem	Language	Result	Execution time	Memory
660854		Danilo21	Power Plant (JOI20_power)	C++14	0 / 100	14 ms	23928 KiB

power

#include <bits/stdc++.h>

#define ll long long
#define ld long double
#define pb push_back
#define fi first
#define se second
#define en '\n'
#define sp ' '
#define tb '\t'
#define ri(n) int n; cin >> n
#define rl(n) ll n; cin >> n
#define rs(s) string s; cin >> s
#define rc(c) char c; cin >> c
#define rv(v) for (auto &x : v) cin >> x
#define pven(v) for (auto x : v) cout << x << en
#define pv(v) for (auto x : v) cout << x << sp; cout << en
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()
#define yes cout << "YES" << en
#define no cout << "NO" << en
#define smin(a, b) a = min(a, b)
#define smax(a, b) a = max(a, b)
#define ssort(a, b) if (a < b) swap(a, b)
#define bitcnt(a) (__builtin_popcountll(a))
#define bithigh(a) (63-__builtin_clzll(a))
#define lg bithigh
#define highpow(a) (1LL << (ll)lg(a))

using namespace std;

const ll LINF = 4e18;
const int mxN = 1e6+10, INF = 2e9;
int n, m, gen[mxN], dp[mxN];
vector<int> g[mxN];

int dfs(int s = 0, int p = -1){

    int sum = 0, mx = 0;
    for (int u : g[s]){
        if (u^p){
            dfs(u, s);
            sum += dp[u];
            smax(mx, dp[u]);
        }
    }
    dp[s] = max(sum - gen[s], gen[s]);
    return max(mx + gen[s], dp[s]);
}

void Solve(){

    cin >> n;
    for (int i = 1; i < n; i++){
        ri(u); ri(v);
        u--; v--;
        g[u].pb(v);
        g[v].pb(u);
    }
    rs(s);
    for (int i = 0; i < n; i++)
        gen[i] = (int)(s[i] - '0');
    cout << dfs() << en;
}

int main(){

    ios::sync_with_stdio(false);
    cin.tie(0); cout.tie(0); cerr.tie(0);
    cout << setprecision(12) << fixed;
    cerr << setprecision(12) << fixed;
    cerr << "Started!" << endl;

    int t = 1;
    //cin >> t;
    while (t--)
        Solve();

    return 0;
}

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