Compilare: main.cpp: In function 'int main()': main.cpp:34:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses] cin>>s+1; ~^~ main.cpp:41:7: warning: this 'if' clause does not guard... [-Wmisleading-indentation] if(n==0) ^~ main.cpp:43:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if' if(p4(c)) ^~ main.cpp:31:14: warning: unused variable 'x' [-Wunused-variable] int k,q,x,i; ^ main.cpp:31:16: warning: unused variable 'i' [-Wunused-variable] int k,q,x,i; ^