Submission #295842

#	Time	Username	Problem	Language	Result	Execution time	Memory
295842		shrek12357	KOVANICE (COI15_kovanice)	C++14	0 / 100	645 ms	524292 KiB

kovanice

#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <map>
#include <set>
#include <climits>
#include <cmath>
#include <fstream>
#include <queue>
using namespace std;
#define MAXN 300005

vector<int> eq[MAXN];
int n, m, k;
vector<int> adjList[MAXN];
int counts[MAXN];
int compress[MAXN];
int ans[MAXN];

void fill(int src, int val) {
	compress[src] = val;
	for (auto i : eq[src]) {
		if (compress[i] == -1) {
			fill(i, val);
		}
	}
}

void dfs(int src, int depth) {
	for (auto i : adjList[src]) {
		if (ans[compress[i]] == -1) {
			dfs(i, depth + 1);
		}
	}
	if (depth == n) {
		ans[compress[src]] = 1;
		return;
	}
	for (auto i : adjList[src]) {
		if (ans[compress[i]] != -1) {
			ans[compress[src]] = ans[compress[i]] + 1;
			return;
		}
	}
}

int main() {
	cin >> n >> m >> k;
	
	for (int i = 0; i <= m; i++) {
		counts[i] = 0;
		compress[i] = -1;
		ans[i] = -1;
	}
	for (int i = 0; i < k; i++) {
		string s;
		cin >> s;
		int node1 = 0;
		int node2 = 0;
		bool found = false;
		for (int a = 0; a < s.size(); a++) {
			if (s[a] == '=' || s[a] == '<' || s[a] == '>') {
				found = true;
				continue;
			}
			if (found == false) {
				node1 = node1 * 10 + (s[a] - 48);
			}
			else {
				node2 = node2 * 10 + (s[a] - 48);
			}
		}
		if (s[1] == '=') {
			eq[node1].push_back(node2);
			eq[node2].push_back(node1);
			continue;
		}
		if (s[1] == '<') {
			swap(node1, node2);
		}
		adjList[node1].push_back(node2);
		counts[node2]++;
	}
	int counter = 1;
	for (int i = 1; i <= m; i++) {
		if (compress[i] == -1) {
			fill(i, counter);
			counter++;
		}
	}
	for (int i = 1; i <= m; i++) {
		if (counts[i] == 0) {
			dfs(i, 1);
		}
	}
	for (int i = 1; i <= m; i++) {
		if (ans[compress[i]] != -1) {
			cout << "K";
			cout << ans[compress[i]] << endl;
		}
		else {
			cout << "?" << endl;
		}
	}
}

Compilation message (stderr)

kovanice.cpp: In function 'int main()':
kovanice.cpp:62:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |   for (int a = 0; a < s.size(); a++) {
      |                   ~~^~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 40
• Subtask 3: 0 / 10
• Subtask 4: 0 / 40