Submission #679629

#	Time	Username	Problem	Language	Result	Execution time	Memory
679629		as111	Sirni (COCI17_sirni)	C++14	0 / 140	2252 ms	538420 KiB

sirni

#include <iostream>
#include <vector>
#include <set>
#include <map>
#include <algorithm>
#include <queue>

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

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

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);
	}
	int i = 1;
	for (int c : cards) {
		ID[c] = i;
		card[i] = c;
		parent[i] = i;
		i++;
	}
	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;
}

Compilation message (stderr)

sirni.cpp: In function 'int main()':
sirni.cpp:45:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::set<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |  for (int i = 1; i <= cards.size();i++) {
      |                  ~~^~~~~~~~~~~~~~~
sirni.cpp:48:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::set<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |    while (s < cards.size() && card[s] < j) s++;
      |           ~~^~~~~~~~~~~~~~
sirni.cpp:49:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::set<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 |    if (s < cards.size()) edges[card[s] % card[i]].emplace_back(i, s);
      |        ~~^~~~~~~~~~~~~~
sirni.cpp: In function 'int join(int, int)':
sirni.cpp:22:12: warning: control reaches end of non-void function [-Wreturn-type]
   22 |  parent[a] = b;
      |  ~~~~~~~~~~^~~

• Subtask 1: 0 / 14
• Subtask 2: 0 / 14
• Subtask 3: 0 / 14
• Subtask 4: 0 / 14
• Subtask 5: 0 / 14
• Subtask 6: 0 / 14
• Subtask 7: 0 / 14
• Subtask 8: 0 / 14
• Subtask 9: 0 / 14
• Subtask 10: 0 / 14