Compilare: main.cpp: In function 'void dfs(Trie*)': main.cpp:67:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < node->edges.size(); i++){ ~~^~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void read()': main.cpp:38:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d %s", &L, &N, s); ^ main.cpp:40:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %s", &K, a); ^ main.cpp: In function 'int main()': main.cpp:75:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("virus.in", "r", stdin); ^ main.cpp:76:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("virus.out", "w", stdout); ^