Compilare: main.cpp: In function 'void dfs(Trie*)': main.cpp:71:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<nod->adj.size(); i++){ ~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:100:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] { freopen("strigat.in", "r", stdin); ^ main.cpp:101:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("strigat.out", "w", stdout); ^ main.cpp:103:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d\n", &n, &m); ^ main.cpp:105:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s", s); ^ main.cpp:106:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &cost); ^ main.cpp:102:20: warning: 'j' may be used uninitialized in this function [-Wmaybe-uninitialized] int n,m,i,cost,j,k,kk,maxx=0,ii; ^