Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:24:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[nod].size(); i++){ ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void solve(int)': main.cpp:35:20: warning: unused variable 'poz' [-Wunused-variable] int i, nr = 0, poz; ^~~ main.cpp: In function 'int numc()': main.cpp:167:37: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(sir, 1, DIM2, fin); ^ main.cpp:176:37: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(sir, 1, DIM2, fin); ^ main.cpp: In function 'int main()': main.cpp:182:29: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(sir, 1, DIM2, fin); ^