/*
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``````
*/
// #pragma GCC optimize("Ofast,no-stack-protector")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
// #pragma GCC optimize("unroll-loops")
// #pragma GCC optimize("fast-math")
// #pragma GCC optimize("section-anchors")
// #pragma GCC optimize("profile-values,profile-reorder-functions,tracer")
// #pragma GCC optimize("vpt")
// #pragma GCC optimize("rename-registers")
// #pragma GCC optimize("move-loop-invariants")
// #pragma GCC optimize("unswitch-loops")
// #pragma GCC optimize("function-sections")
// #pragma GCC optimize("data-sections")
// #pragma GCC optimize("branch-target-load-optimize")
// #pragma GCC optimize("branch-target-load-optimize2")
// #pragma GCC optimize("btr-bb-exclusive")
// #pragma comment(linker, "/STACK:367077216")
#include <iostream>
#include <iostream>
#include <vector>
#include <algorithm>
#include <iomanip>
#include <tuple>
#include <math.h>
#include <set>
#include <stack>
#include <bitset>
#include <map>
#include <queue>
#include <random>
#include <unordered_set>
#include <unordered_map>
#define DEBUG
#define fi first
#define se second
#define pqueue priority_queue
#define pb(x) push_back(x)
//#define endl '\n'
#define all(x) x.begin(), x.end()
#define int long long
#define mk(a, b) make_pair(a, b)
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef vector<int> vi;
typedef vector<vector<int> > vvi;
typedef vector<ull> vull;
typedef vector<ll> vll;
// typedef tuple<ll, ll, ll> tiii;
typedef pair<int, int> pii;
typedef vector<pair<int, int> > vpii;
typedef vector<bool> vb;
typedef vector<string> vs;
typedef vector< vector<ll> > vvll;
typedef vector<char> vc;
const int inf = 1e9 + 228;
const ll infll = 1e18;
const ll MOD = 1e9 + 7;
//static const int maxn = 1e6 + 228;
const ld eps = 1e-5;
const int K = 31;
const ld eps2 = 1e-9;
const ll MOD2 = 998244353;
const ll dosz = 5e5;
const ll SZ = (1<<18);
const ld PI = 3.1415926535;
void fast_io(){
ios_base::sync_with_stdio(0);
cin.tie(0);
// freopen("a.in", "r", stdin);
// freopen("digit.out", "w", stdout);
}
const int maxn = 2e5 + 228;
vi g[maxn];
int dp[maxn];
string s;
int ans = 0;
void dfs(int v, int p = -1){
if(s[v] == '1'){
ans = max(ans, 1ll);
dp[v] = -1;
} else{
dp[v] = 0;
}
for(int i:g[v]){
if(i!=p){
dfs(i, v);
dp[v] += dp[i];
if(s[v]){
ans = max(dp[i]+1, ans);
}
}
}
if(s[v] == '1')
dp[v] = max(dp[v], 1ll);
ans = max(ans, dp[v]);
dp[v] = max(dp[v], 0ll);
}
void solve(){
int n;
cin >> n;
for(int i=0; i+1<n; i++){
int a, b;
cin >> a >> b;
a--, b--;
g[a].pb(b);
g[b].pb(a);
}
cin >> s;
dfs(0);
// cout << dp[0] << endl;
// cout << dp[0] << endl;
cout << ans << endl;
}
signed main(){
fast_io();
srand(time(NULL));
// cout << fixed << setprecision(3);
int q = 1;
// cin >> q;
while(q--)
solve();
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
5 ms |
4992 KB |
Output is correct |
| 2 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 3 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 4 |
Correct |
3 ms |
4992 KB |
Output is correct |
| 5 |
Correct |
3 ms |
4992 KB |
Output is correct |
| 6 |
Correct |
3 ms |
4992 KB |
Output is correct |
| 7 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 8 |
Correct |
3 ms |
4992 KB |
Output is correct |
| 9 |
Correct |
3 ms |
4992 KB |
Output is correct |
| 10 |
Correct |
3 ms |
4992 KB |
Output is correct |
| 11 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 12 |
Correct |
3 ms |
4992 KB |
Output is correct |
| 13 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 14 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 15 |
Incorrect |
4 ms |
4992 KB |
Output isn't correct |
| 16 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
5 ms |
4992 KB |
Output is correct |
| 2 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 3 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 4 |
Correct |
3 ms |
4992 KB |
Output is correct |
| 5 |
Correct |
3 ms |
4992 KB |
Output is correct |
| 6 |
Correct |
3 ms |
4992 KB |
Output is correct |
| 7 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 8 |
Correct |
3 ms |
4992 KB |
Output is correct |
| 9 |
Correct |
3 ms |
4992 KB |
Output is correct |
| 10 |
Correct |
3 ms |
4992 KB |
Output is correct |
| 11 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 12 |
Correct |
3 ms |
4992 KB |
Output is correct |
| 13 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 14 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 15 |
Incorrect |
4 ms |
4992 KB |
Output isn't correct |
| 16 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
5 ms |
4992 KB |
Output is correct |
| 2 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 3 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 4 |
Correct |
3 ms |
4992 KB |
Output is correct |
| 5 |
Correct |
3 ms |
4992 KB |
Output is correct |
| 6 |
Correct |
3 ms |
4992 KB |
Output is correct |
| 7 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 8 |
Correct |
3 ms |
4992 KB |
Output is correct |
| 9 |
Correct |
3 ms |
4992 KB |
Output is correct |
| 10 |
Correct |
3 ms |
4992 KB |
Output is correct |
| 11 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 12 |
Correct |
3 ms |
4992 KB |
Output is correct |
| 13 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 14 |
Correct |
4 ms |
4992 KB |
Output is correct |
| 15 |
Incorrect |
4 ms |
4992 KB |
Output isn't correct |
| 16 |
Halted |
0 ms |
0 KB |
- |
