Submission #425568

#	Time	Username	Problem	Language	Result	Execution time	Memory
425568		hhhhaura	Dynamic Diameter (CEOI19_diameter)	C++14	24 / 100	5079 ms	11036 KiB

diameter

#define wiwihorz
#include <bits/stdc++.h>
#pragma GCC optimize("Ofast")
#pragma loop-opt(on)

#define rep(i, a, b) for(int i = a; i <= b; i++)
#define rrep(i, a, b) for(int i = b; i >= a; i--)
#define ceil(a, b) ((a + b - 1) / (b))
#define all(x) x.begin(), x.end()

#define INF 1000000000000000000
#define MOD 1000000007
#define eps (1e-9)

using namespace std;
#define int long long int
#define lld long double
#define pii pair<int, int>
#define random mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count())

#ifdef wiwihorz
#define print(a...) kout("[" + string(#a) + "] = ", a)
void vprint(auto L, auto R) {while(L < R) cerr << *L << " \n"[next(L) == R], ++L;}
void kout() { cerr << endl; }
template<class T1, class ... T2> void kout(T1 a, T2 ... e) { cerr << a << " ", kout(e...); }
#else
#define print(...) 0
#define vprint(...) 0
#endif
namespace solver {
	int n, ans;
	vector<int> es, cost, dp;
	vector<vector<int>> mp;
	void init_(int _n) {
		n = _n;
		mp.assign(n + 1, vector<int>());
		es.clear();
		cost.clear();
		dp.assign(n + 1, 0);
	}
	void add_edge(int a, int b, int c) {
		mp[a].push_back(es.size());
		mp[b].push_back(es.size());
		es.push_back(a ^ b);
		cost.push_back(c);
	}
	void dfs(int x, int par) {
		dp[x] = 0;
		int v1 = 0, v2 = 0;
		for(auto i : mp[x]) if(i != par) {
			int to = es[i] ^ x;
			dfs(to, i);
			int vv = dp[to] + cost[i];
			dp[x] = max(dp[x], vv);
			if(vv > v1) swap(vv, v1);
			if(vv > v2) swap(vv, v2);
		} 
		ans = max(ans, v1 + v2);
	}
	int query(int id, int c) {
		ans = 0, cost[id] = c;
		dfs(1, -1);
		return ans;
	}
};
using namespace solver;
signed main() {
	ios::sync_with_stdio(false), cin.tie(0);
	int n, q, w, last = 0;
	cin >> n >> q >> w, init_(n);
	rep(i, 1, n - 1) {
		int a, b, c; 
		cin >> a >> b >> c;
		add_edge(a, b, c);
	}	
	while(q --) {
		int x, y; cin >> x >> y;
		x = (x + last) % (n - 1);
		y = (y + last) % w;
		int ans = query(x, y);
		last = ans;
		cout << ans << "\n";
	}
	return 0;
} 

Compilation message (stderr)

diameter.cpp:4: warning: ignoring '#pragma loop ' [-Wunknown-pragmas]
    4 | #pragma loop-opt(on)
      | 
diameter.cpp:23:13: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   23 | void vprint(auto L, auto R) {while(L < R) cerr << *L << " \n"[next(L) == R], ++L;}
      |             ^~~~
diameter.cpp:23:21: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   23 | void vprint(auto L, auto R) {while(L < R) cerr << *L << " \n"[next(L) == R], ++L;}
      |                     ^~~~

• Subtask 1: 11 / 11
• Subtask 2: 13 / 13
• Subtask 3: 0 / 7
• Subtask 4: 0 / 18
• Subtask 5: 0 / 24
• Subtask 6: 0 / 27