Compilare: user.cpp: In function ‘void progDin()’: user.cpp:51:11: warning: unused variable ‘g’ [-Wunused-variable] FILE *g=freopen("podm.out","w",stdout); ^ user.cpp: In function ‘int main()’: user.cpp:65:11: warning: unused variable ‘f’ [-Wunused-variable] FILE *f=freopen("podm.in","r",stdin); ^ user.cpp:66:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&n); ^ user.cpp: In function ‘char nextchar()’: user.cpp:14:33: 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,stdin); ^ user.cpp: In function ‘void progDin()’: user.cpp:47:38: warning: ‘kmin’ may be used uninitialized in this function [-Wmaybe-uninitialized] M[i][j]=mint;M[j][i]=kmin; ^