Submission #764804

#TimeUsernameProblemLanguageResultExecution timeMemory
764804vjudge1Roadside Advertisements (NOI17_roadsideadverts)C++17
30 / 100
22 ms6452 KiB
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;

#pragma GCC optimization("g", on)
#pragma GCC optimization("03")
#pragma comment(linker, "/stack:200000000")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("inline")
#pragma GCC optimize("-fgcse,-fgcse-lm")
#pragma GCC optimize("-ftree-pre,-ftree-vrp")
#pragma GCC optimize("-ffast-math")
#pragma GCC optimize("-fipa-sra")
#pragma GCC optimize("-fpeephole2")
#pragma GCC optimize("-fsched-spec")
#pragma GCC optimize("Ofast,no-stack-protector")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
#pragma GCC optimize("unroll-loops")

#define boba ios_base::sync_with_stdio(false); cin.tie(NULL);
#define br break
#define sp " "
#define en "\n"
#define pb push_back
#define sz size()
#define bg begin()
#define ed end()
#define in insert
#define ss second
#define ff first
#define rbg rbegin()
#define setp(a) cout << fixed; cout << setprecision(a);
#define all(v) v.begin(), v.end()
#define emp empty()
 
typedef long long ll;
typedef long double ld;
typedef pair<ll, ll> pll;
typedef double db;
typedef tree<
    long long,
    null_type,
    less_equal<long long>,
    rb_tree_tag,
    tree_order_statistics_node_update> orset;

void freopen(string s) { freopen((s + ".in").c_str(), "r", stdin); freopen((s + ".out").c_str(), "w", stdout); }
ll bp(ll x, ll y, ll z) { ll res = 1; while (y) { if (y & 1) { res = (res * x) % z; y--; } x = (x * x) % z; y >>= 1; } return res; }
// C(n, k) = ((fact[n] * bp(fact[k], mod - 2)) % mod * bp(fact[n - k], mod - 2)) % mod;
ll lcm(ll a, ll b) { return (a / __gcd(a, b)) * b; }

const ll N = 5e4 + 11;	
const ll inf = 1e9 + 7;
ll tt = 1;
vector<pll> g[N];
ll d[N], pr[N];

void dfs(ll v, ll p) {
	for (auto to : g[v]) {
		if (to.ff != p) {
			d[to.ff] = d[v] + 1;
			pr[d[to.ff]] = pr[d[v]] + to.ss;
//			cout << d[to.ff] << sp << pr[d[to.ff]] << sp << to.ff << sp << v << en;
			dfs(to.ff, v);
		}
	}
}
	
void solve() {
	ll n; cin >> n;
	for (int i = 1;i < n;i++) {
		ll u, v, w; cin >> u >> v >> w;
		u++, v++;
		g[u].pb({v, w});
		g[v].pb({u, w});
	}
	ll rt = 0;
	for (int i = 1;i <= n;i++) {
		if (g[i].sz == 1) {
			d[i] = 1;
			rt = i;
			dfs(i, 0);
			br;
		}
	}
	ll q; cin >> q;
	while (q--) {
		ll b[6]; 
		ll mn = inf, mx = 0;
		for (int i = 1;i <= 5;i++) {
			cin >> b[i];
			b[i]++;
			mn = min(mn, d[b[i]]);
			mx = max(mx, d[b[i]]);
		}
//		cout << mn << sp << mx << en;
		cout << pr[mx] - pr[mn] << en;
	}
}	
  
int main() {    
   boba                                   
//    freopen("ladder");
//    precalc();
//    cin >> tt;	
	for (int i = 1;i <= tt;i++) {
		solve(); 
    }
}

Compilation message (stderr)

roadsideadverts.cpp:7: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    7 | #pragma GCC optimization("g", on)
      | 
roadsideadverts.cpp:8: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    8 | #pragma GCC optimization("03")
      | 
roadsideadverts.cpp:9: warning: ignoring '#pragma comment ' [-Wunknown-pragmas]
    9 | #pragma comment(linker, "/stack:200000000")
      | 
roadsideadverts.cpp: In function 'void solve()':
roadsideadverts.cpp:79:5: warning: variable 'rt' set but not used [-Wunused-but-set-variable]
   79 |  ll rt = 0;
      |     ^~
roadsideadverts.cpp: In function 'void freopen(std::string)':
roadsideadverts.cpp:49:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   49 | void freopen(string s) { freopen((s + ".in").c_str(), "r", stdin); freopen((s + ".out").c_str(), "w", stdout); }
      |                          ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
roadsideadverts.cpp:49:75: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   49 | void freopen(string s) { freopen((s + ".in").c_str(), "r", stdin); freopen((s + ".out").c_str(), "w", stdout); }
      |                                                                    ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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