Compilare: main.cpp: In function 'int e(int, int)': main.cpp:60:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v.size();i++) ~^~~~~~~~~ main.cpp:19:9: warning: unused variable 'nr' [-Wunused-variable] int nr,x,semn,sol,i; ^~ main.cpp: In function 'int main()': main.cpp:84:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses] fin>>s+1; ~^~