Compilare: main.cpp: In function 'int main()': main.cpp:10:17: warning: unused variable 'x' [-Wunused-variable] long long n,x,last,sum=0,t,k,l,sum2=0; ^ main.cpp:10:19: warning: unused variable 'last' [-Wunused-variable] long long n,x,last,sum=0,t,k,l,sum2=0; ^~~~ main.cpp:56:9: warning: 'l' may be used uninitialized in this function [-Wmaybe-uninitialized] if(i==l) ^~ main.cpp:46:16: warning: 'k' may be used uninitialized in this function [-Wmaybe-uninitialized] if(i==t||i==k) ~~~~^~~~~~ main.cpp:27:22: warning: 't' may be used uninitialized in this function [-Wmaybe-uninitialized] if(i!=t&&i!=t+1) ~^~