Compilare: main.cpp: In function 'bool subsir(char*, char*)': main.cpp:22:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] return i==strlen(x); ~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:39:37: warning: suggest parentheses around '&&' within '||' [-Wparentheses] if( ls>lmax || ls==lmax && strcmp(s[i],s[pmax]) < 0 ) ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:30:10: warning: unused variable 'ok' [-Wunused-variable] bool ok; ^~