Submission #589442

#	Time	Username	Problem	Language	Result	Execution time	Memory
589442		Soumya1	Split the Attractions (IOI19_split)	C++17	18 / 100	81 ms	12716 KiB

split

#include "split.h"
#include <bits/stdc++.h>
using namespace std;
const int mxN = 1e5 + 5;
vector<int> ad[mxN];
bool vis[mxN];
int B;
vector<int> s1;
void dfs(int u) {
	vis[u] = true;
	if (s1.size() == B) return;
	s1.push_back(u);
	for (int v : ad[u]) {
		if (vis[v]) continue;
		dfs(v);
	}
}
vector<int> find_split(int n, int a, int b, int c, vector<int> p, vector<int> q) {
	for (int i = 0; i < p.size(); i++) {
		ad[p[i]].push_back(q[i]);
		ad[q[i]].push_back(p[i]);
	}
	if (a == 1) {
		vector<int> ans(n, 3);
		B = b;
		dfs(1);
		for (int i : s1) ans[i] = 2;
		for (int i = 0; i < n; i++) {
			if (ans[i] == 3) {
				ans[i] = 1;
				break;
			}
		}
		return ans;
	} else {
		int start = 0;
		vector<int> deg(n);
		for (int i : p) deg[i]++;
		for (int i : q) deg[i]++;
		for (int i = 0; i < n; i++) {
			if (deg[i] == 1) start = i;
		}
		vector<int> ans(n);
		int cur = 0;
		while (!ans[start]) {
			cur++;
			if (cur <= a) ans[start] = 1;
			else if (cur <= a + b) ans[start] = 2;
			else ans[start] = 3;
			for (int to : ad[start]) {
				if (!ans[to]) start = to;
			}
		}
		return ans;
	}
	return {};
}

Compilation message (stderr)

split.cpp: In function 'void dfs(int)':
split.cpp:11:16: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   11 |  if (s1.size() == B) return;
      |      ~~~~~~~~~~^~~~
split.cpp: In function 'std::vector<int> find_split(int, int, int, int, std::vector<int>, std::vector<int>)':
split.cpp:19:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |  for (int i = 0; i < p.size(); i++) {
      |                  ~~^~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 11 / 11
• Subtask 3: 0 / 22
• Subtask 4: 0 / 24
• Subtask 5: 0 / 36