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:33:19: warning: unused variable ‘c’ [-Wunused-variable] long long a,b,c,total=0; ^ user.cpp:34:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,ok=0; ^ user.cpp:53:21: warning: ‘a’ may be used uninitialized in this function [-Wmaybe-uninitialized] cost[x][y]=total+a; ^