oj.uz

답안 #647909

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
647909 2022-10-04T13:11:16 Z ghostwriter Power Plant (JOI20_power) C++14
100 / 100
 184 ms 41152 KB 
#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
#include <debug.h>
#else
#define debug(...)
#endif
#define ft front
#define bk back
#define st first
#define nd second
#define ins insert
#define ers erase
#define pb push_back
#define pf push_front
#define _pb pop_back
#define _pf pop_front
#define lb lower_bound
#define ub upper_bound
#define mtp make_tuple
#define bg begin
#define ed end
#define all(x) (x).bg(), (x).ed()
#define sz(x) (int)(x).size()
typedef long long ll; typedef unsigned long long ull;
typedef double db; typedef long double ldb;
typedef pair<int, int> pi; typedef pair<ll, ll> pll;
typedef vector<int> vi; typedef vector<ll> vll; typedef vector<pi> vpi; typedef vector<pll> vpll;
typedef string str;
template<typename T> T gcd(T a, T b) { return (b == 0? a : gcd(b, a % b)); }
template<typename T> T lcm(T a, T b) { return a / gcd(a, b) * b; }
#define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
#define FOS(i, r, l) for (int (i) = (r); (i) >= (l); --(i))
#define FRN(i, n) for (int (i) = 0; (i) < (n); ++(i))
#define FSN(i, n) for (int (i) = (n) - 1; (i) >= 0; --(i))
#define EACH(i, x) for (auto &(i) : (x))
#define WHILE while
#define file "TEST"
mt19937 rd(chrono::steady_clock::now().time_since_epoch().count());
ll rand(ll l, ll r) { return uniform_int_distribution<ll>(l, r)(rd); }
/*
----------------------------------------------------------------
    END OF TEMPLATE
----------------------------------------------------------------
    Tran The Bao - ghostwriter
    Training for VOI23 gold medal
----------------------------------------------------------------
    DIT ME CHUYEN BAO LOC
----------------------------------------------------------------
*/
const int oo = 1e9;
const int N = 2e5 + 1;
int n, s[N], d[N][2];
vi adj[N];
void dfs(int u, int p) {
	int s0 = 0, s1 = 0;
	vi adjn;
	EACH(v, adj[u]) {
		if (v == p) continue;
		dfs(v, u);
		adjn.pb(v);
		s0 += d[v][0];
		s1 += d[v][1];
	}
	vi a;
	if (s[u]) d[u][0] = max(d[u][0], 1);
	EACH(v, adjn) {
		d[u][0] = max(d[u][0], d[v][0]);
		if (s[u]) d[u][0] = max(d[u][0], d[v][1] + 1);
		a.pb(d[v][1]);
	}
	if (sz(a) > 1) {
		sort(all(a), greater<int>());
		int cur = a[0] + a[1];
		d[u][0] = max(d[u][0], cur - s[u]);
		FOR(i, 2, sz(a) - 1) {
			cur += a[i];
			d[u][0] = max(d[u][0], cur - s[u]);
		}
	}
	if (s[u]) d[u][1] = max(d[u][1], 1);
	d[u][1] = max(d[u][1], s1 - s[u]);
}
signed main() {
    ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
    // freopen(file".inp", "r", stdin);
    // freopen(file".out", "w", stdout);
    cin >> n;
    FOR(i, 1, n - 1) {
    	int a, b;
    	cin >> a >> b;
    	adj[a].pb(b);
    	adj[b].pb(a);
    }
    FOR(i, 1, n) {
    	char c;
    	cin >> c;
    	s[i] = c - '0';
    }
    dfs(1, 0);
    cout << d[1][0];
    return 0;
}
/*
6
2 3
4 3
1 3
3 5
6 2
110011
----------------------------------------------------------------
From Benq:
    stuff you should look for
        * int overflow, array bounds
        * special cases (n=1?)
        * do smth instead of nothing and stay organized
        * WRITE STUFF DOWN
        * DON'T GET STUCK ON ONE APPROACH
----------------------------------------------------------------
*/

Compilation message

power.cpp: In function 'void dfs(int, int)':
power.cpp:36:31: warning: unnecessary parentheses in declaration of 'v' [-Wparentheses]
   36 | #define EACH(i, x) for (auto &(i) : (x))
      |                               ^
power.cpp:58:2: note: in expansion of macro 'EACH'
   58 |  EACH(v, adj[u]) {
      |  ^~~~
power.cpp:36:31: warning: unnecessary parentheses in declaration of 'v' [-Wparentheses]
   36 | #define EACH(i, x) for (auto &(i) : (x))
      |                               ^
power.cpp:67:2: note: in expansion of macro 'EACH'
   67 |  EACH(v, adjn) {
      |  ^~~~
power.cpp:32:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   32 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
power.cpp:76:3: note: in expansion of macro 'FOR'
   76 |   FOR(i, 2, sz(a) - 1) {
      |   ^~~
power.cpp: In function 'int main()':
power.cpp:32:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   32 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
power.cpp:89:5: note: in expansion of macro 'FOR'
   89 |     FOR(i, 1, n - 1) {
      |     ^~~
power.cpp:32:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   32 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
power.cpp:95:5: note: in expansion of macro 'FOR'
   95 |     FOR(i, 1, n) {
      |     ^~~

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 5028 KB Output is correct
3 Correct 4 ms 4948 KB Output is correct
4 Correct 4 ms 4948 KB Output is correct
5 Correct 3 ms 5028 KB Output is correct
6 Correct 3 ms 5028 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 3 ms 5036 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 3 ms 4948 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 3 ms 4948 KB Output is correct

Subtask #2
41.0 / 41.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 5028 KB Output is correct
3 Correct 4 ms 4948 KB Output is correct
4 Correct 4 ms 4948 KB Output is correct
5 Correct 3 ms 5028 KB Output is correct
6 Correct 3 ms 5028 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 3 ms 5036 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 3 ms 4948 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 3 ms 4948 KB Output is correct
22 Correct 3 ms 5076 KB Output is correct
23 Correct 4 ms 5076 KB Output is correct
24 Correct 3 ms 5044 KB Output is correct
25 Correct 4 ms 5076 KB Output is correct
26 Correct 4 ms 5096 KB Output is correct
27 Correct 4 ms 5076 KB Output is correct
28 Correct 4 ms 5044 KB Output is correct
29 Correct 4 ms 5332 KB Output is correct
30 Correct 4 ms 5228 KB Output is correct
31 Correct 4 ms 5076 KB Output is correct
32 Correct 4 ms 5076 KB Output is correct
33 Correct 4 ms 5036 KB Output is correct
34 Correct 4 ms 5076 KB Output is correct
35 Correct 3 ms 5076 KB Output is correct
36 Correct 4 ms 5124 KB Output is correct
37 Correct 4 ms 5076 KB Output is correct
38 Correct 4 ms 5076 KB Output is correct
39 Correct 5 ms 5172 KB Output is correct
40 Correct 4 ms 5092 KB Output is correct
41 Correct 4 ms 5204 KB Output is correct
42 Correct 4 ms 5076 KB Output is correct
43 Correct 4 ms 5076 KB Output is correct
44 Correct 3 ms 5204 KB Output is correct
45 Correct 4 ms 5172 KB Output is correct
46 Correct 3 ms 5172 KB Output is correct
47 Correct 4 ms 5076 KB Output is correct
48 Correct 3 ms 5204 KB Output is correct
49 Correct 4 ms 5212 KB Output is correct
50 Correct 4 ms 5172 KB Output is correct
51 Correct 3 ms 5204 KB Output is correct
52 Correct 4 ms 5076 KB Output is correct
53 Correct 4 ms 5204 KB Output is correct
54 Correct 4 ms 5092 KB Output is correct
55 Correct 4 ms 5076 KB Output is correct
56 Correct 3 ms 5076 KB Output is correct
57 Correct 4 ms 5300 KB Output is correct
58 Correct 4 ms 5176 KB Output is correct
59 Correct 3 ms 5076 KB Output is correct
60 Correct 3 ms 5204 KB Output is correct
61 Correct 4 ms 5076 KB Output is correct
62 Correct 4 ms 5332 KB Output is correct
63 Correct 3 ms 5076 KB Output is correct

Subtask #3
53.0 / 53.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 5028 KB Output is correct
3 Correct 4 ms 4948 KB Output is correct
4 Correct 4 ms 4948 KB Output is correct
5 Correct 3 ms 5028 KB Output is correct
6 Correct 3 ms 5028 KB Output is correct
7 Correct 3 ms 4948 KB Output is correct
8 Correct 3 ms 4948 KB Output is correct
9 Correct 3 ms 4948 KB Output is correct
10 Correct 3 ms 4948 KB Output is correct
11 Correct 3 ms 4948 KB Output is correct
12 Correct 3 ms 4948 KB Output is correct
13 Correct 3 ms 4948 KB Output is correct
14 Correct 3 ms 4948 KB Output is correct
15 Correct 3 ms 5036 KB Output is correct
16 Correct 3 ms 4948 KB Output is correct
17 Correct 3 ms 4948 KB Output is correct
18 Correct 3 ms 4948 KB Output is correct
19 Correct 3 ms 4948 KB Output is correct
20 Correct 3 ms 4948 KB Output is correct
21 Correct 3 ms 4948 KB Output is correct
22 Correct 3 ms 5076 KB Output is correct
23 Correct 4 ms 5076 KB Output is correct
24 Correct 3 ms 5044 KB Output is correct
25 Correct 4 ms 5076 KB Output is correct
26 Correct 4 ms 5096 KB Output is correct
27 Correct 4 ms 5076 KB Output is correct
28 Correct 4 ms 5044 KB Output is correct
29 Correct 4 ms 5332 KB Output is correct
30 Correct 4 ms 5228 KB Output is correct
31 Correct 4 ms 5076 KB Output is correct
32 Correct 4 ms 5076 KB Output is correct
33 Correct 4 ms 5036 KB Output is correct
34 Correct 4 ms 5076 KB Output is correct
35 Correct 3 ms 5076 KB Output is correct
36 Correct 4 ms 5124 KB Output is correct
37 Correct 4 ms 5076 KB Output is correct
38 Correct 4 ms 5076 KB Output is correct
39 Correct 5 ms 5172 KB Output is correct
40 Correct 4 ms 5092 KB Output is correct
41 Correct 4 ms 5204 KB Output is correct
42 Correct 4 ms 5076 KB Output is correct
43 Correct 4 ms 5076 KB Output is correct
44 Correct 3 ms 5204 KB Output is correct
45 Correct 4 ms 5172 KB Output is correct
46 Correct 3 ms 5172 KB Output is correct
47 Correct 4 ms 5076 KB Output is correct
48 Correct 3 ms 5204 KB Output is correct
49 Correct 4 ms 5212 KB Output is correct
50 Correct 4 ms 5172 KB Output is correct
51 Correct 3 ms 5204 KB Output is correct
52 Correct 4 ms 5076 KB Output is correct
53 Correct 4 ms 5204 KB Output is correct
54 Correct 4 ms 5092 KB Output is correct
55 Correct 4 ms 5076 KB Output is correct
56 Correct 3 ms 5076 KB Output is correct
57 Correct 4 ms 5300 KB Output is correct
58 Correct 4 ms 5176 KB Output is correct
59 Correct 3 ms 5076 KB Output is correct
60 Correct 3 ms 5204 KB Output is correct
61 Correct 4 ms 5076 KB Output is correct
62 Correct 4 ms 5332 KB Output is correct
63 Correct 3 ms 5076 KB Output is correct
64 Correct 150 ms 16372 KB Output is correct
65 Correct 144 ms 16472 KB Output is correct
66 Correct 157 ms 16648 KB Output is correct
67 Correct 135 ms 16392 KB Output is correct
68 Correct 139 ms 16464 KB Output is correct
69 Correct 168 ms 16468 KB Output is correct
70 Correct 164 ms 16428 KB Output is correct
71 Correct 148 ms 16524 KB Output is correct
72 Correct 142 ms 16476 KB Output is correct
73 Correct 161 ms 39180 KB Output is correct
74 Correct 171 ms 39040 KB Output is correct
75 Correct 154 ms 16332 KB Output is correct
76 Correct 150 ms 16332 KB Output is correct
77 Correct 154 ms 16296 KB Output is correct
78 Correct 155 ms 16312 KB Output is correct
79 Correct 184 ms 16356 KB Output is correct
80 Correct 150 ms 16228 KB Output is correct
81 Correct 125 ms 17760 KB Output is correct
82 Correct 150 ms 17096 KB Output is correct
83 Correct 173 ms 26160 KB Output is correct
84 Correct 162 ms 30236 KB Output is correct
85 Correct 164 ms 29636 KB Output is correct
86 Correct 154 ms 19196 KB Output is correct
87 Correct 160 ms 17972 KB Output is correct
88 Correct 131 ms 18352 KB Output is correct
89 Correct 134 ms 18144 KB Output is correct
90 Correct 131 ms 17740 KB Output is correct
91 Correct 142 ms 18176 KB Output is correct
92 Correct 143 ms 18916 KB Output is correct
93 Correct 149 ms 24012 KB Output is correct
94 Correct 132 ms 26480 KB Output is correct
95 Correct 132 ms 24536 KB Output is correct
96 Correct 143 ms 20980 KB Output is correct
97 Correct 130 ms 17996 KB Output is correct
98 Correct 156 ms 16996 KB Output is correct
99 Correct 141 ms 16876 KB Output is correct
100 Correct 138 ms 22780 KB Output is correct
101 Correct 123 ms 18984 KB Output is correct
102 Correct 126 ms 17480 KB Output is correct
103 Correct 147 ms 17116 KB Output is correct
104 Correct 82 ms 19516 KB Output is correct
105 Correct 160 ms 33484 KB Output is correct
106 Correct 81 ms 19288 KB Output is correct
107 Correct 84 ms 19256 KB Output is correct
108 Correct 173 ms 40484 KB Output is correct
109 Correct 80 ms 19520 KB Output is correct
110 Correct 177 ms 41152 KB Output is correct
111 Correct 139 ms 16288 KB Output is correct