Compilare: user.cpp: In function ‘void citire()’: user.cpp:16:10: warning: unused variable ‘c’ [-Wunused-variable] char c; ^ user.cpp: In function ‘void solv(int, int)’: user.cpp:28:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0 ;i<s[x][y].size() ;i++){ ^ user.cpp:25:23: warning: unused variable ‘c’ [-Wunused-variable] long long a=0,b=0,c,total=0; ^ user.cpp:26:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,ok=0,d; ^