Compilare: main.cpp: In function 'void DFS(int)': main.cpp:112:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++){ ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void buildCasa()': main.cpp:179:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < help[i].size(); j++){ ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'char nextch()': main.cpp:28:37: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buf, BUF_SIZE, 1, fin); ^