Compilare: main.cpp: In function 'void read()': main.cpp:54:11: warning: unused variable 'x' [-Wunused-variable] int i,x,y,z,cost; ^ main.cpp:54:13: warning: unused variable 'y' [-Wunused-variable] int i,x,y,z,cost; ^ main.cpp:54:15: warning: unused variable 'z' [-Wunused-variable] int i,x,y,z,cost; ^ main.cpp: In function 'bool b_ford()': main.cpp:119:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<G[nod].size();j++) ~^~~~~~~~~~~~~~ main.cpp: In member function 'char InParser::read_ch()': main.cpp:23:29: 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:229:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("smen.out","w",stdout); ^