Compilare: main.cpp: In function 'int main()': main.cpp:137:23: warning: unused variable 'ta' [-Wunused-variable] long long n,a,b,m,ta,tb,i,j,nrc=0,nrd=0,t,c,mx=-1,k1=0,k2=0,k=0,cnt=0,pas,nod=-1,pz1,pz2; ^~ main.cpp:137:26: warning: unused variable 'tb' [-Wunused-variable] long long n,a,b,m,ta,tb,i,j,nrc=0,nrd=0,t,c,mx=-1,k1=0,k2=0,k=0,cnt=0,pas,nod=-1,pz1,pz2; ^~ main.cpp:137:31: warning: unused variable 'j' [-Wunused-variable] long long n,a,b,m,ta,tb,i,j,nrc=0,nrd=0,t,c,mx=-1,k1=0,k2=0,k=0,cnt=0,pas,nod=-1,pz1,pz2; ^ main.cpp:137:33: warning: unused variable 'nrc' [-Wunused-variable] long long n,a,b,m,ta,tb,i,j,nrc=0,nrd=0,t,c,mx=-1,k1=0,k2=0,k=0,cnt=0,pas,nod=-1,pz1,pz2; ^~~ main.cpp:137:39: warning: unused variable 'nrd' [-Wunused-variable] long long n,a,b,m,ta,tb,i,j,nrc=0,nrd=0,t,c,mx=-1,k1=0,k2=0,k=0,cnt=0,pas,nod=-1,pz1,pz2; ^~~ main.cpp:137:45: warning: unused variable 't' [-Wunused-variable] long long n,a,b,m,ta,tb,i,j,nrc=0,nrd=0,t,c,mx=-1,k1=0,k2=0,k=0,cnt=0,pas,nod=-1,pz1,pz2; ^ main.cpp:137:47: warning: unused variable 'c' [-Wunused-variable] long long n,a,b,m,ta,tb,i,j,nrc=0,nrd=0,t,c,mx=-1,k1=0,k2=0,k=0,cnt=0,pas,nod=-1,pz1,pz2; ^ main.cpp:137:49: warning: unused variable 'mx' [-Wunused-variable] long long n,a,b,m,ta,tb,i,j,nrc=0,nrd=0,t,c,mx=-1,k1=0,k2=0,k=0,cnt=0,pas,nod=-1,pz1,pz2; ^~ main.cpp:137:55: warning: unused variable 'k1' [-Wunused-variable] long long n,a,b,m,ta,tb,i,j,nrc=0,nrd=0,t,c,mx=-1,k1=0,k2=0,k=0,cnt=0,pas,nod=-1,pz1,pz2; ^~ main.cpp:137:60: warning: unused variable 'k2' [-Wunused-variable] long long n,a,b,m,ta,tb,i,j,nrc=0,nrd=0,t,c,mx=-1,k1=0,k2=0,k=0,cnt=0,pas,nod=-1,pz1,pz2; ^~ main.cpp:137:69: warning: unused variable 'cnt' [-Wunused-variable] long long n,a,b,m,ta,tb,i,j,nrc=0,nrd=0,t,c,mx=-1,k1=0,k2=0,k=0,cnt=0,pas,nod=-1,pz1,pz2; ^~~ main.cpp:137:75: warning: unused variable 'pas' [-Wunused-variable] long long n,a,b,m,ta,tb,i,j,nrc=0,nrd=0,t,c,mx=-1,k1=0,k2=0,k=0,cnt=0,pas,nod=-1,pz1,pz2; ^~~ main.cpp:137:79: warning: unused variable 'nod' [-Wunused-variable] long long n,a,b,m,ta,tb,i,j,nrc=0,nrd=0,t,c,mx=-1,k1=0,k2=0,k=0,cnt=0,pas,nod=-1,pz1,pz2; ^~~ main.cpp:137:86: warning: unused variable 'pz1' [-Wunused-variable] long long n,a,b,m,ta,tb,i,j,nrc=0,nrd=0,t,c,mx=-1,k1=0,k2=0,k=0,cnt=0,pas,nod=-1,pz1,pz2; ^~~ main.cpp:137:90: warning: unused variable 'pz2' [-Wunused-variable] long long n,a,b,m,ta,tb,i,j,nrc=0,nrd=0,t,c,mx=-1,k1=0,k2=0,k=0,cnt=0,pas,nod=-1,pz1,pz2; ^~~ main.cpp: In function 'char read_ch()': main.cpp:16:33: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(_in_buff, 1, 4096, _fin); ^