Compilare: main.cpp: In function 'int main()': main.cpp:21:19: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 21 | for(i=1; i<strlen(s); i++) | ~^~~~~~~~~~ main.cpp:36:19: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 36 | for(i=1; i<strlen(s); i++) pi[i]=0; | ~^~~~~~~~~~ main.cpp:14:27: warning: unused variable 'cnt' [-Wunused-variable] 14 | int i, n, res=0, k=0, cnt=0, cnt2=0, j; | ^~~ main.cpp:14:34: warning: unused variable 'cnt2' [-Wunused-variable] 14 | int i, n, res=0, k=0, cnt=0, cnt2=0, j; | ^~~~ main.cpp:15:10: warning: unused variable 'ch' [-Wunused-variable] 15 | char ch; | ^~