효율적인 해킹

#include <cstdio> #include <cstring> #include <vector> std::vector<int> g_chain[10001]; bool g_visited[10001]; int g_result[10001]; int g_count = 0; int g_max_count = -1; int g_number_of_com; int g_number_of_relation; void input_action(void) { int index; int input1; int input2; index = -1; scanf("%d %d", &g_number_of_com, &g_number_of_relation); while (++index < g_number_of_relation) { scanf("%d %d", &input1, &input2); g_chain[input2].push_back(input1); } } void dfs(int start) { int index; int size; int next; index = -1; size = static_cast<int>(g_chain[start].size()); g_visited[start] = true; while (++index < size) { next = g_chain[start][index]; if (!g_visited[next]) { ++g_count; dfs(next); } } } void output_action(void) { int index; index = -1; while (++index <= g_number_of_com) if(g_result[index] == g_max_count) printf("%d ", index); } void solution(void) { int index; index = -1; input_action(); memset(g_result, -1, sizeof(g_result)); while (++index <= g_number_of_com) { if (g_chain[index].size() != 0) { memset(g_visited, false, sizeof(g_visited)); g_count = 0; dfs(index); if (g_count > g_max_count) g_max_count = g_count; g_result[index] = g_count; } } output_action(); } int main(void) { solution(); return (0); }