Compilare: main.cpp: In function 'int main()': main.cpp:68:69: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(dend != -1 && y == dend || dend == -1&&sol.size()==n) ~~~~~~~~~~^~~ main.cpp:68:31: warning: suggest parentheses around '&&' within '||' [-Wparentheses] if(dend != -1 && y == dend || dend == -1&&sol.size()==n) ~~~~~~~~~~~^~~~~~~~~~~~ main.cpp:78:69: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(dend != -1 && y == dend || dend == -1&&sol.size()==n) ~~~~~~~~~~^~~ main.cpp:78:31: warning: suggest parentheses around '&&' within '||' [-Wparentheses] if(dend != -1 && y == dend || dend == -1&&sol.size()==n) ~~~~~~~~~~~^~~~~~~~~~~~ main.cpp:88:65: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(dend != -1 && y == dend || dend == -1&&sol.size()==n) ~~~~~~~~~~^~~ main.cpp:88:27: warning: suggest parentheses around '&&' within '||' [-Wparentheses] if(dend != -1 && y == dend || dend == -1&&sol.size()==n) ~~~~~~~~~~~^~~~~~~~~~~~ main.cpp:94:65: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(dend != -1 && y == dend || dend == -1&&sol.size()==n) ~~~~~~~~~~^~~ main.cpp:94:27: warning: suggest parentheses around '&&' within '||' [-Wparentheses] if(dend != -1 && y == dend || dend == -1&&sol.size()==n) ~~~~~~~~~~~^~~~~~~~~~~~