Compilare: main.cpp: In function 'void sol()': main.cpp:42:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=4;k<strlen(aux) && k<x && ok;k++) ~^~~~~~~~~~~~ main.cpp:48:78: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(s[k]=='1' && s[k+1]=='2' && strlen(aux)+2<=x) ~~~~~~~~~~~~~^~~ main.cpp:57:67: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(s[k]=='3' && strlen(aux)+2<=x) ~~~~~~~~~~~~~^~~ main.cpp:70:58: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(s[k]=='2' && strlen(aux)+1<=x) ~~~~~~~~~~~~~^~~ main.cpp:78:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(strlen(aux)+4<=x && s[k]=='1' && s[k+2]=='3') ~~~~~~~~~~~~~^~~ main.cpp:87:35: warning: statement has no effect [-Wunused-value] ok==0; ~~^~~ main.cpp:91:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(strlen(aux)!=x || (strlen(aux)==x && aux[x-1]=='C' && s[x-1]!='2') ||(strlen(aux)==x && aux[x-1]=='B')) ~~~~~~~~~~~^~~ main.cpp:91:55: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(strlen(aux)!=x || (strlen(aux)==x && aux[x-1]=='C' && s[x-1]!='2') ||(strlen(aux)==x && aux[x-1]=='B')) ~~~~~~~~~~~^~~ main.cpp:91:106: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(strlen(aux)!=x || (strlen(aux)==x && aux[x-1]=='C' && s[x-1]!='2') ||(strlen(aux)==x && aux[x-1]=='B')) ~~~~~~~~~~~^~~ main.cpp:107:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=1;k<strlen(aux) && k<x && ok;k++) ~^~~~~~~~~~~~ main.cpp:112:78: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(s[k]=='1' && s[k+1]=='2' && strlen(aux)+2<=x) ~~~~~~~~~~~~~^~~ main.cpp:122:67: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(s[k]=='3' && strlen(aux)+2<=x) ~~~~~~~~~~~~~^~~ main.cpp:135:58: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(s[k]=='2' && strlen(aux)+1<=x) ~~~~~~~~~~~~~^~~ main.cpp:143:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(strlen(aux)+4<=x && s[k]=='1' && s[k+2]=='3') ~~~~~~~~~~~~~^~~ main.cpp:152:35: warning: statement has no effect [-Wunused-value] ok==0; ~~^~~ main.cpp:156:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(strlen(aux)!=x || (strlen(aux)==x && aux[x-1]=='C' && s[x-1]!='2') ||(strlen(aux)==x && aux[x-1]=='B')) ~~~~~~~~~~~^~~ main.cpp:156:55: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]