Compilare: main.cpp: In function 'int main()': main.cpp:13:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=2; i<s.size(); i++) ~^~~~~~~~~ main.cpp:20:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i>s1.size()+1&&pi[i]==s1.size()) ~^~~~~~~~~~~~ main.cpp:20:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i>s1.size()+1&&pi[i]==s1.size()) ~~~~~^~~~~~~~~~~ main.cpp:10:11: warning: unused variable 'ok' [-Wunused-variable] int i,ok=0,cnt=0,l,r; ^~ main.cpp:10:22: warning: unused variable 'l' [-Wunused-variable] int i,ok=0,cnt=0,l,r; ^ main.cpp:10:24: warning: unused variable 'r' [-Wunused-variable] int i,ok=0,cnt=0,l,r; ^