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Submission #373219

# Submission time Handle Problem Language Result Execution time Memory
373219 2021-03-03T19:00:43 Z AmineWeslati Power Plant (JOI20_power) C++14
100 / 100
 239 ms 33004 KB 
//Never stop trying
#include "bits/stdc++.h"
using namespace std;
#define boost ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)

typedef long long ll;
typedef string str;
typedef long double ld;
typedef pair<int, int> pi;
#define fi first
#define se second
typedef vector<int> vi;
typedef vector<pi> vpi;
#define pb push_back
#define eb emplace_back
#define sz(x) (int)x.size()
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
#define endl "\n"
#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)

const int MOD = 1e9 + 7; //998244353
const ll INF = 1e18;
const int MX = 2e5 + 10;
const int nx[4] = {0, 0, 1, -1}, ny[4] = {1, -1, 0, 0}; //right left down up

template<class T> using V = vector<T>;
template<class T> bool ckmin(T& a, const T& b) { return a > b ? a = b, 1 : 0; }
template<class T> bool ckmax(T& a, const T& b) { return a < b ? a = b, 1 : 0; }
ll cdiv(ll a, ll b) { return a / b + ((a ^ b) > 0 && a % b); } // divide a by b rounded up
//constexpr int log2(int x) { return 31 - __builtin_clz(x); } // floor(log2(x))

mt19937 rng(chrono::system_clock::now().time_since_epoch().count());
//mt19937_64 rng(chrono::system_clock::now().time_since_epoch().count());
ll random(ll a, ll b){
    return a + rng() % (b - a + 1);
}
#ifndef LOCAL  
#define cerr if(false) cerr
#endif
#define dbg(x) cerr << #x << " : " << x << endl; 
#define dbgs(x,y) cerr << #x << " : " << x << " / " << #y << " : " << y << endl;
#define dbgv(v) cerr << #v << " : " << "[ "; for(auto it : v) cerr << it << ' '; cerr << ']' << endl;
#define here() cerr << "here" << endl;

void IO() {
#ifdef LOCAL
    freopen("input.txt", "r", stdin); 
    freopen("output.txt", "w", stdout);
#endif
}
/////////////////////////ONLY CLEAN CODES ALLOWED/////////////////////////

int N; 
vi adj[MX],gen(MX),f1(MX),f2(MX);

void dfs1(int u=1, int p=0){
	int ans=gen[u];
	int s=-gen[u];
	for(auto v: adj[u]) if(v!=p){
		dfs1(v,u);
		s+=f1[v];
	}
	ckmax(ans,s);
	f1[u]=ans;
}

void dfs2(int u=1, int p=0){
	int ans=gen[u];
	int s=-gen[u];
	for(auto v: adj[u]) if(v!=p){
		dfs2(v,u);
		ckmax(ans,f2[v]);
		s+=f1[v];

		if(gen[u]) ckmax(ans,f1[v]+1);
	}
	ckmax(ans,s);
	f2[u]=ans;
}

int main() {
    boost; IO();

    cin>>N; 
    FOR(i,0,N-1){
    	int u,v; cin>>u>>v;
    	adj[u].pb(v);
    	adj[v].pb(u);
    }
    FOR(i,1,N+1){
    	char c; cin>>c;
    	gen[i]=c-'0';
    }

    dfs1();
    dfs2();

    cout << f2[1] << endl;

    

    return 0;
}
//Change your approach

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 7404 KB Output is correct
2 Correct 5 ms 7404 KB Output is correct
3 Correct 5 ms 7404 KB Output is correct
4 Correct 5 ms 7404 KB Output is correct
5 Correct 5 ms 7404 KB Output is correct
6 Correct 5 ms 7404 KB Output is correct
7 Correct 5 ms 7404 KB Output is correct
8 Correct 5 ms 7404 KB Output is correct
9 Correct 5 ms 7404 KB Output is correct
10 Correct 5 ms 7404 KB Output is correct
11 Correct 5 ms 7404 KB Output is correct
12 Correct 5 ms 7404 KB Output is correct
13 Correct 6 ms 7532 KB Output is correct
14 Correct 5 ms 7404 KB Output is correct
15 Correct 5 ms 7404 KB Output is correct
16 Correct 6 ms 7424 KB Output is correct
17 Correct 6 ms 7404 KB Output is correct
18 Correct 5 ms 7404 KB Output is correct
19 Correct 5 ms 7404 KB Output is correct
20 Correct 5 ms 7404 KB Output is correct
21 Correct 5 ms 7404 KB Output is correct

Subtask #2
41.0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 7404 KB Output is correct
2 Correct 5 ms 7404 KB Output is correct
3 Correct 5 ms 7404 KB Output is correct
4 Correct 5 ms 7404 KB Output is correct
5 Correct 5 ms 7404 KB Output is correct
6 Correct 5 ms 7404 KB Output is correct
7 Correct 5 ms 7404 KB Output is correct
8 Correct 5 ms 7404 KB Output is correct
9 Correct 5 ms 7404 KB Output is correct
10 Correct 5 ms 7404 KB Output is correct
11 Correct 5 ms 7404 KB Output is correct
12 Correct 5 ms 7404 KB Output is correct
13 Correct 6 ms 7532 KB Output is correct
14 Correct 5 ms 7404 KB Output is correct
15 Correct 5 ms 7404 KB Output is correct
16 Correct 6 ms 7424 KB Output is correct
17 Correct 6 ms 7404 KB Output is correct
18 Correct 5 ms 7404 KB Output is correct
19 Correct 5 ms 7404 KB Output is correct
20 Correct 5 ms 7404 KB Output is correct
21 Correct 5 ms 7404 KB Output is correct
22 Correct 6 ms 7532 KB Output is correct
23 Correct 6 ms 7532 KB Output is correct
24 Correct 6 ms 7532 KB Output is correct
25 Correct 7 ms 7532 KB Output is correct
26 Correct 6 ms 7532 KB Output is correct
27 Correct 7 ms 7532 KB Output is correct
28 Correct 6 ms 7532 KB Output is correct
29 Correct 6 ms 7680 KB Output is correct
30 Correct 6 ms 7664 KB Output is correct
31 Correct 6 ms 7532 KB Output is correct
32 Correct 7 ms 7532 KB Output is correct
33 Correct 6 ms 7532 KB Output is correct
34 Correct 6 ms 7532 KB Output is correct
35 Correct 6 ms 7532 KB Output is correct
36 Correct 8 ms 7532 KB Output is correct
37 Correct 6 ms 7532 KB Output is correct
38 Correct 6 ms 7532 KB Output is correct
39 Correct 6 ms 7532 KB Output is correct
40 Correct 6 ms 7532 KB Output is correct
41 Correct 6 ms 7532 KB Output is correct
42 Correct 6 ms 7532 KB Output is correct
43 Correct 6 ms 7532 KB Output is correct
44 Correct 6 ms 7532 KB Output is correct
45 Correct 6 ms 7532 KB Output is correct
46 Correct 6 ms 7532 KB Output is correct
47 Correct 8 ms 7532 KB Output is correct
48 Correct 8 ms 7532 KB Output is correct
49 Correct 6 ms 7532 KB Output is correct
50 Correct 6 ms 7536 KB Output is correct
51 Correct 6 ms 7532 KB Output is correct
52 Correct 6 ms 7532 KB Output is correct
53 Correct 6 ms 7532 KB Output is correct
54 Correct 6 ms 7532 KB Output is correct
55 Correct 6 ms 7532 KB Output is correct
56 Correct 6 ms 7532 KB Output is correct
57 Correct 6 ms 7660 KB Output is correct
58 Correct 6 ms 7532 KB Output is correct
59 Correct 6 ms 7532 KB Output is correct
60 Correct 6 ms 7532 KB Output is correct
61 Correct 6 ms 7532 KB Output is correct
62 Correct 6 ms 7660 KB Output is correct
63 Correct 6 ms 7532 KB Output is correct

Subtask #3
53.0 / 53.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 7404 KB Output is correct
2 Correct 5 ms 7404 KB Output is correct
3 Correct 5 ms 7404 KB Output is correct
4 Correct 5 ms 7404 KB Output is correct
5 Correct 5 ms 7404 KB Output is correct
6 Correct 5 ms 7404 KB Output is correct
7 Correct 5 ms 7404 KB Output is correct
8 Correct 5 ms 7404 KB Output is correct
9 Correct 5 ms 7404 KB Output is correct
10 Correct 5 ms 7404 KB Output is correct
11 Correct 5 ms 7404 KB Output is correct
12 Correct 5 ms 7404 KB Output is correct
13 Correct 6 ms 7532 KB Output is correct
14 Correct 5 ms 7404 KB Output is correct
15 Correct 5 ms 7404 KB Output is correct
16 Correct 6 ms 7424 KB Output is correct
17 Correct 6 ms 7404 KB Output is correct
18 Correct 5 ms 7404 KB Output is correct
19 Correct 5 ms 7404 KB Output is correct
20 Correct 5 ms 7404 KB Output is correct
21 Correct 5 ms 7404 KB Output is correct
22 Correct 6 ms 7532 KB Output is correct
23 Correct 6 ms 7532 KB Output is correct
24 Correct 6 ms 7532 KB Output is correct
25 Correct 7 ms 7532 KB Output is correct
26 Correct 6 ms 7532 KB Output is correct
27 Correct 7 ms 7532 KB Output is correct
28 Correct 6 ms 7532 KB Output is correct
29 Correct 6 ms 7680 KB Output is correct
30 Correct 6 ms 7664 KB Output is correct
31 Correct 6 ms 7532 KB Output is correct
32 Correct 7 ms 7532 KB Output is correct
33 Correct 6 ms 7532 KB Output is correct
34 Correct 6 ms 7532 KB Output is correct
35 Correct 6 ms 7532 KB Output is correct
36 Correct 8 ms 7532 KB Output is correct
37 Correct 6 ms 7532 KB Output is correct
38 Correct 6 ms 7532 KB Output is correct
39 Correct 6 ms 7532 KB Output is correct
40 Correct 6 ms 7532 KB Output is correct
41 Correct 6 ms 7532 KB Output is correct
42 Correct 6 ms 7532 KB Output is correct
43 Correct 6 ms 7532 KB Output is correct
44 Correct 6 ms 7532 KB Output is correct
45 Correct 6 ms 7532 KB Output is correct
46 Correct 6 ms 7532 KB Output is correct
47 Correct 8 ms 7532 KB Output is correct
48 Correct 8 ms 7532 KB Output is correct
49 Correct 6 ms 7532 KB Output is correct
50 Correct 6 ms 7536 KB Output is correct
51 Correct 6 ms 7532 KB Output is correct
52 Correct 6 ms 7532 KB Output is correct
53 Correct 6 ms 7532 KB Output is correct
54 Correct 6 ms 7532 KB Output is correct
55 Correct 6 ms 7532 KB Output is correct
56 Correct 6 ms 7532 KB Output is correct
57 Correct 6 ms 7660 KB Output is correct
58 Correct 6 ms 7532 KB Output is correct
59 Correct 6 ms 7532 KB Output is correct
60 Correct 6 ms 7532 KB Output is correct
61 Correct 6 ms 7532 KB Output is correct
62 Correct 6 ms 7660 KB Output is correct
63 Correct 6 ms 7532 KB Output is correct
64 Correct 182 ms 16492 KB Output is correct
65 Correct 204 ms 16492 KB Output is correct
66 Correct 186 ms 16492 KB Output is correct
67 Correct 188 ms 16492 KB Output is correct
68 Correct 182 ms 16620 KB Output is correct
69 Correct 190 ms 16492 KB Output is correct
70 Correct 191 ms 16492 KB Output is correct
71 Correct 195 ms 16620 KB Output is correct
72 Correct 184 ms 16492 KB Output is correct
73 Correct 223 ms 31596 KB Output is correct
74 Correct 218 ms 31596 KB Output is correct
75 Correct 182 ms 16364 KB Output is correct
76 Correct 191 ms 16620 KB Output is correct
77 Correct 191 ms 16364 KB Output is correct
78 Correct 210 ms 16492 KB Output is correct
79 Correct 193 ms 16340 KB Output is correct
80 Correct 190 ms 16364 KB Output is correct
81 Correct 154 ms 16740 KB Output is correct
82 Correct 170 ms 16616 KB Output is correct
83 Correct 200 ms 22636 KB Output is correct
84 Correct 239 ms 25324 KB Output is correct
85 Correct 207 ms 24812 KB Output is correct
86 Correct 188 ms 18156 KB Output is correct
87 Correct 207 ms 17520 KB Output is correct
88 Correct 181 ms 17920 KB Output is correct
89 Correct 178 ms 17900 KB Output is correct
90 Correct 180 ms 17644 KB Output is correct
91 Correct 182 ms 17900 KB Output is correct
92 Correct 194 ms 18412 KB Output is correct
93 Correct 197 ms 21224 KB Output is correct
94 Correct 166 ms 23300 KB Output is correct
95 Correct 167 ms 21736 KB Output is correct
96 Correct 174 ms 19692 KB Output is correct
97 Correct 170 ms 17772 KB Output is correct
98 Correct 172 ms 17260 KB Output is correct
99 Correct 200 ms 16876 KB Output is correct
100 Correct 186 ms 20716 KB Output is correct
101 Correct 170 ms 18284 KB Output is correct
102 Correct 178 ms 17388 KB Output is correct
103 Correct 181 ms 17132 KB Output is correct
104 Correct 101 ms 17248 KB Output is correct
105 Correct 208 ms 27884 KB Output is correct
106 Correct 112 ms 17120 KB Output is correct
107 Correct 105 ms 17248 KB Output is correct
108 Correct 223 ms 32632 KB Output is correct
109 Correct 104 ms 17508 KB Output is correct
110 Correct 213 ms 33004 KB Output is correct
111 Correct 173 ms 16620 KB Output is correct