제출 #710720

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
710720		aVe	Sjekira (COCI20_sjekira)	C++14	0 / 110	103 ms	22364 KiB

sjekira

#include <bits/stdc++.h>
#define ll long long
#define pii pair<int,int>
#define pll pair<ll,ll>
#define vi vector<int>
#define vl vector<ll>
#define mp make_pair
#define pb push_back
#define se second
#define fi first
using namespace std;
void __print(int x) {cerr << x;}
void __print(long x) {cerr << x;}
void __print(long long x) {cerr << x;}
void __print(unsigned x) {cerr << x;}
void __print(unsigned long x) {cerr << x;}
void __print(unsigned long long x) {cerr << x;}
void __print(float x) {cerr << x;}
void __print(double x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << '\'' << x << '\'';}
void __print(const char *x) {cerr << '\"' << x << '\"';}
void __print(const string &x) {cerr << '\"' << x << '\"';}
void __print(bool x) {cerr << (x ? "true" : "false");}

template<typename T, typename V>
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? "," : ""), __print(i); cerr << "}";}
void _print() {cerr << "]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
#ifndef ONLINE_JUDGE
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
#define debug(x...)
#endif
clock_t startTime;
double getCurrentTime() {
	return (double)(clock() - startTime) / CLOCKS_PER_SEC;
}
ll set_on(ll n, ll k){
	return (n |= 1 << k);
}
ll set_off(ll n, ll k){
	return (n &= ~(1UL << k));
}
bool check_bit(ll n, ll k){
	int bit = (n >> k) & 1U;
	if(bit == 1)
		return true;
	return false;
}
int n;
vl arr, G[100100], sum, sz, depth, maximum;
void dfs(int at, int prev, int dep){
	sum[at] = arr[at];
	sz[at] = 1;
	depth[at] = dep;
	maximum[at] = arr[at];
	for(auto next : G[at]){
		if(next != prev){
			dfs(next, at, dep + 1);
			sum[at] += sum[next];
			sz[at] += sz[next];
			maximum[at] = max(maximum[at], maximum[next]);
		}
	}
}
void solve(){
	cin>>n;
	arr.resize(n);
	maximum.resize(n);
	sum.resize(n);
	sz.resize(n);
	depth.resize(n);
	for(int i = 0; i < n; i++)
		cin>>arr[i];
	for(int i = 1; i < n; i++){
		int a, b;
		cin>>a>>b;
		a--;b--;
		G[a].pb(b);
		G[b].pb(a);
	}
//	assert(false);
	dfs(0, -1, 0);
//	assert(false);
	set<pii, greater<pii>> ord;
	set<int> ava;
	for(int i = 0; i < n; i++){
		ord.insert(mp(arr[i], i));
		ava.insert(i);
	}
	ll ans = 0;
//	assert(false);
	for(auto t : ord){
		int vertex = t.se;
		if(ava.find(vertex) == ava.end())
			continue;
			
		if(ava.size() == 1)	break;
//		debug(vertex+1);
		vector<pair<ll, int> > subs;
		for(auto next : G[vertex]){
			if(ava.find(next) == ava.end())	continue;
			
			subs.pb(mp(arr[vertex] * sz[next] + sum[next], next));
		}	
		sort(subs.begin(), subs.end());
		for(int i = 0; i < subs.size(); i++){
			if(i + 1 == subs.size()){
				ll maks = 0;
				for(auto t : ava){
					if(t == vertex)	continue;
					maks = max(maks, arr[t]);
				}
//				debug(vertex+1, arr[vertex], maks);
				ans += arr[vertex] + maks;
				ava.erase(vertex);
				continue;
			}
//			debug(subs[i].fi, subs[i].se);
			ans += subs[i].fi;
			queue<int> q;
			q.push(subs[i].se);
			while(!q.empty()){
				int at = q.front();
				ava.erase(at);
				q.pop();
				for(auto next : G[at]){
					if(next == vertex)	continue;
					if(ava.find(next) != ava.end()){
						q.push(next);
					}
				}
			}
		}
	}
	cout<<ans<<endl;
}
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
	cout.precision(10);
	cout<<fixed;
	startTime = clock();
	int t=1;
//	cin>>t;
	while(t--)
		solve();

	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

sjekira.cpp: In function 'void solve()':
sjekira.cpp:111:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  111 |   for(int i = 0; i < subs.size(); i++){
      |                  ~~^~~~~~~~~~~~~
sjekira.cpp:112:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  112 |    if(i + 1 == subs.size()){
      |       ~~~~~~^~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 30
• Subtask 4: 0 / 60