Compilare: user.cpp: In function ‘int main()’: user.cpp:33:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < strlen(v) - 1; i++){ ^ user.cpp:37:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = i; j < strlen(v); j++){ ^ user.cpp:73:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < strlen(v);i++){ ^ user.cpp:59:22: warning: ‘k’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(ma < k-i){ ^