제출 #1036522

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1036522		model_code	Petrol stations (CEOI24_stations)	C++17	18 / 100	3581 ms	30876 KiB

Main

// Author: Jiří Kalvoda
#include<bits/stdc++.h>

using namespace std;

using ll = long long;

int n;
ll k;

struct Node{
	vector<pair<Node*, ll>> e;
	ll counts=0;
	int id;
	int go(ll current_power, Node *from)
	{
		int subtree_size = 1;
		for(auto &[nd, l] : e)
			if(nd != from)
			{
				ll r_power = current_power - l;
				if(r_power < 0)
				{
					int r_subtree_size = nd->go(k-l, this);
					counts += r_subtree_size;
					subtree_size += r_subtree_size;
				}
				else
					subtree_size += nd->go(r_power, this);
			}
		return subtree_size;
	}
} *nds;

int main(int argc, char ** argv)
{
	scanf("%d%lld", &n, &k);
	nds = new Node[n];
	for (int i=0; i<n; i++) nds[i].id = i;
	for (int i=0; i<n-1; i++)
	{
		int a,b;
		ll l;
		scanf("%d%d%lld", &a, &b, &l);
		nds[a].e.push_back({nds+b, l});
		nds[b].e.push_back({nds+a, l});
	}
	for (int i=0; i<n; i++) nds[i].go(k, NULL);
	for (int i=0; i<n; i++) printf("%lld\n", nds[i].counts);
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

Main.cpp: In function 'int main(int, char**)':
Main.cpp:37:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |  scanf("%d%lld", &n, &k);
      |  ~~~~~^~~~~~~~~~~~~~~~~~
Main.cpp:44:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   44 |   scanf("%d%d%lld", &a, &b, &l);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

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