제출 #679637

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
679637		as111	Sirni (COCI17_sirni)	C++17	0 / 140	2219 ms	295940 KiB

sirni

#include <bits/stdc++.h>

#define MAXN 100000
using namespace std;
typedef pair<int, int> pi;
const int MAXP = 1e7;

int N;
set<int> cards;
vector<pi> edges[MAXP + 5]; // PQ of edges
priority_queue<pair<int, pi>> PQ;

int parent[MAXN + 5]; // initialize parent[i] = i
int findRoot(int a) {
	return parent[a] = (parent[a] == a ? a : findRoot(parent[a]));
}
int join(int a, int b) {
	a = findRoot(a); b = findRoot(b);
	if (a == b) return 0;
	parent[a] = b;
	return 1;
}


int card[MAXN + 5]; // value for each card ID
map<int, int> ID; // card value to card ID
int main() {
	cin >> N;
	for (int i = 0; i < N; i++) {
		int P;
		cin >> P;
		cards.insert(P);
	}
	N = 1;
	for (int c : cards) {
		card[N++] = c;
		parent[N-1] = N - 1;
	}
	for (int i = 1; i <= cards.size(); i++) {
		int s = i + 1;
		for (int j = card[i]; j < MAXP; j += card[i]) {
			while (s < cards.size() && card[s] < j) s++;
			if (s < cards.size()) edges[card[s] % card[i]].emplace_back(i, s);
		}
	}
	long long ans = 0;
	for (int p = 0; p < MAXP; p++) {
		for (auto curr : edges[p]) {
			int f = curr.first;
			int s = curr.second;
			if (join(f, s))ans += p;
		}
	}
	cout << ans << endl;
}

컴파일 시 표준 에러 (stderr) 메시지

sirni.cpp: In function 'int main()':
sirni.cpp:39:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::set<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |  for (int i = 1; i <= cards.size(); i++) {
      |                  ~~^~~~~~~~~~~~~~~
sirni.cpp:42:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::set<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |    while (s < cards.size() && card[s] < j) s++;
      |           ~~^~~~~~~~~~~~~~
sirni.cpp:43:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::set<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |    if (s < cards.size()) edges[card[s] % card[i]].emplace_back(i, s);
      |        ~~^~~~~~~~~~~~~~

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