Compilare: main.cpp: In function 'void dijkstra(int, int)': main.cpp:120:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < v[nod].size(); j ++) { ~~^~~~~~~~~~~~~~~ main.cpp: In member function 'char InParser::read_ch()': main.cpp:14:38: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, 4096, fin); ^ main.cpp: In function 'int main()': main.cpp:161:11: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized] x = tata[1][x]; ~~^~~~~~~~~~~~ main.cpp:197:16: warning: 'nod' may be used uninitialized in this function [-Wmaybe-uninitialized] out << c <<"\n"; ^~~~