Submission #495756

#	Time	Username	Problem	Language	Result	Execution time	Memory
495756		mansur	Birthday gift (IZhO18_treearray)	C++14	30 / 100	4053 ms	24152 KiB

treearray

#include<bits/stdc++.h>	
 
#pragma optimize ("g",on)
#pragma GCC optimize ("inline")
#pragma GCC optimize ("Ofast")
#pragma GCC optimize ("unroll-loops")
#pragma GCC optimize ("03")
#pragma GCC target ("sse,sse2,sse3,ssse3,sse4,popcnt,abm,avx2,mmx,fma,avx,tune=native")
#pragma comment(linker, "/stack:200000000")

//01001101 01100001 01101011 01101000 01100001  01100111 01100001 01111001 

using namespace std;

#define all(a) a.begin(), a.end()                                                   
#define rall(a) a.rbegin(), a.rend()
#define ll long long
#define pb push_back
#define sz(a) a.size()
#define nl '\n'
#define popb pop_back()                                                                   
#define ld double
#define ull unsigned long long
#define ff first                                         
#define ss second  
#define fix fixed << setprecision
#define pii pair<int, int>                          
#define E exit (0)
 
const int inf = 1e9, N = 1e6 + 1, mod = 998244353;                    

vector<pii> dir = {{1, 0}, {0, 1}, {-1, 0}, {0, -1}};

int tin[N], tout[N], timer;

int up[N][18];

vector<int> adj[N];

void dfs(int u, int p) {
	tin[u] = timer++;
	up[u][0] = p;
	for (int i = 1; i < 18; i++) up[u][i] = up[up[u][i - 1]][i - 1];
	for (auto e: adj[u]) {
		if (e != p) dfs(e, u);
	}
	tout[u] = timer;
}

bool is(int a, int b) {
	return tin[a] <= tin[b] && tout[a] >= tout[b];
}

int lca(int u, int v) {
	if (is(u, v)) return u;
	if (is(v, u)) return v;
	for (int i = 17; i >= 0; i--) {
		int x = up[u][i];
		if (is(x, v)) continue;
		u = x;
	}
	return up[u][0];
}

main() {                                                         
	//freopen("cowrect.in", "r", stdin);                                                                                     
	//freopen("cowrect.out", "w", stdout);                                                                                     
	ios_base::sync_with_stdio(NULL);                                                                                        
	cin.tie(NULL);
	int n, m, q;
	cin >> n >> m >> q;
	for (int i = 1; i < n; i++) {
		int u, v;
		cin >> u >> v;
		adj[u].pb(v);
		adj[v].pb(u);
	}
	int a[m + 1];
	for (int i = 1; i <= m; i++) {
		cin >> a[i];
	}
	dfs(1, 1);
	while (q--) {
	 	int t;
	 	cin >> t;
	 	if (t == 1) {
	 	 	int pos, v;
	 	 	cin >> pos >> v;
	 	 	a[pos] = v;
	 	}else {
	 	 	int l, r, v;
	 	 	cin >> l >> r >> v;
	 	 	bool ok = 0;
	 	 	for (int x = l; x <= r && !ok; x++) { 	
	 	 		int lc = a[x];
	 	 		for (int y = x; y <= r; y++) {
	 	 			lc = lca(lc, a[y]);
	 	 			if (lc == v) {
	 	 			 	cout << x << ' ' << y << nl;
	 	 			 	ok = 1;
	 	 			 	break;
	 	 			}
	 	 		}
	 	 	}
	 	 	if (!ok) cout << -1 << ' ' << -1 << nl;
	 	}
	}
}

Compilation message (stderr)

treearray.cpp:3: warning: ignoring '#pragma optimize ' [-Wunknown-pragmas]
    3 | #pragma optimize ("g",on)
      | 
treearray.cpp:9: warning: ignoring '#pragma comment ' [-Wunknown-pragmas]
    9 | #pragma comment(linker, "/stack:200000000")
      | 
treearray.cpp:65:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   65 | main() {
      | ^~~~

• Subtask 1: 12 / 12
• Subtask 2: 18 / 18
• Subtask 3: 0 / 26
• Subtask 4: 0 / 44