Compilare: main.cpp: In function 'void solve(int, int, int)': main.cpp:101:18: warning: variable 'it' set but not used [-Wunused-but-set-variable] for(auto it : aint[nod]) { ^~ main.cpp:110:14: warning: variable 'it' set but not used [-Wunused-but-set-variable] for(auto it : aint[nod]) { ^~ main.cpp: In function 'char nextch()': main.cpp:14:34: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buf, 1, MAXBUF, fi); ^