Submission #94364

#	Time	Username	Problem	Language	Result	Execution time	Memory
94364		jasony123123	Uzastopni (COCI15_uzastopni)	C++11	160 / 160	235 ms	7796 KiB

uzastopni

#define _CRT_SECURE_NO_WARNINGS
#include <bits/stdc++.h>
#include <unordered_map>
#include <array>
//#include <ext/pb_ds/tree_policy.hpp>
//#include <ext/pb_ds/assoc_container.hpp>
using namespace std;
//using namespace __gnu_pbds;

#define FOR(i,start,end) for(int i=start;i<(int)(end);i++)
#define FORE(i,start,end) for(int i=start;i<=(int)end;i++)
#define RFOR(i,start,end) for(int i = start; i>end; i--)
#define RFORE(i,start,end) for(int i = start; i>=end; i--)
#define all(a) a.begin(), a.end()
#define mt make_tuple
#define mp make_pair
#define v vector
#define sf scanf
#define pf printf
#define dvar(x) cout << #x << " := " << x << "\n"
#define darr(x,n) FOR(i,0,n) cout << #x << "[" << i << "]" << " := " << x[i] << "\n"

typedef long long ll;
typedef long double ld;
typedef pair<int, int > pii;
typedef pair<ll, ll> pll;
//template <class T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template<class T> void minn(T &a, T b) { a = min(a, b); }
template<class T> void maxx(T &a, T b) { a = max(a, b); }

void io() {
#ifdef LOCAL_PROJECT 
	freopen("input.in", "r", stdin); freopen("output.out", "w", stdout);
#else 
	/* online submission */

#endif 
	ios_base::sync_with_stdio(false); cin.tie(NULL);
}

const ll MOD = 1000000007LL;
const ll PRIME = 105943LL;
const ll INF = 1e18;
/**************************COCI15 R1 P6 uzastopni************************************/
const int SZ = 10000;
typedef array<bitset<100>, 100> dpt;
int N, J[SZ];
v<int> adj[SZ];
v<pii> dp[SZ];

dpt trans, curdp;

void dfs(int x, int p) {
	for (auto c : adj[x]) if (c != p) {
		dfs(c, x);
	}

	FOR(i, 0, 100) trans[i].reset(), curdp[i].reset();
	for (auto c : adj[x]) if (c != p) {
		for (auto s : dp[c]) trans[s.first][s.second] = 1;
	}
	RFORE(l, 99, J[x] + 1) {
		curdp[l] = trans[l];
		FORE(r, l, 99) if (trans[l][r] && r + 1 <= 99) {
			curdp[l] |= curdp[r + 1];
		}
	}
	curdp[J[x]][J[x]] = 1;
	if (J[x] != 99)
		curdp[J[x]] |= curdp[J[x] + 1];
	RFORE(l, J[x] - 1, 0) {
		FORE(r, l, J[x] - 1) if (trans[l][r]) {
			curdp[l][r] = 1;
			curdp[l] |= curdp[r + 1];
		}
	}
	FOR(l, 0, 100) FOR(r, l, 100) if (curdp[l][r] && r < J[x] || J[x] < l)
		curdp[l][r] = 0;
	FOR(l, 0, 100) FOR(r, l, 100) if (curdp[l][r])
		dp[x].push_back({ l,r });
}

int main() {
	io();
	cin >> N;
	FOR(i, 0, N) {
		cin >> J[i];
		J[i]--;
	}
	FOR(i, 0, N - 1) {
		int a, b; cin >> a >> b;
		adj[a - 1].push_back(b - 1), adj[b - 1].push_back(a - 1);
	}
	dfs(0, -1);
	cout << dp[0].size() << "\n";
}

Compilation message (stderr)

uzastopni.cpp: In function 'void dfs(int, int)':
uzastopni.cpp:77:48: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
  FOR(l, 0, 100) FOR(r, l, 100) if (curdp[l][r] && r < J[x] || J[x] < l)

• Subtask 1: 160 / 160