Compilare: user.cpp: In function ‘void update_left(int, int&, int)’: user.cpp:14:15: warning: unused variable ‘i’ [-Wunused-variable] int f,A,B,i,j,popas=0,cost=0; ^ user.cpp: In function ‘void update_right(int, int&, int)’: user.cpp:33:15: warning: unused variable ‘i’ [-Wunused-variable] int f,A,B,i,j,popas=0,cost=0; ^ user.cpp: In function ‘void update_get(int, int&)’: user.cpp:52:15: warning: unused variable ‘i’ [-Wunused-variable] int f,A,B,i,j,popas=0,cost=0; ^ user.cpp: In function ‘int main()’: user.cpp:95:9: warning: unused variable ‘i’ [-Wunused-variable] int i,j,p,popas1,popas2,cost1,cost2; ^ user.cpp:95:22: warning: unused variable ‘popas2’ [-Wunused-variable] int i,j,p,popas1,popas2,cost1,cost2; ^ user.cpp: In function ‘void read()’: user.cpp:70:43: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d",&n,&m,&k1,&k2); ^ user.cpp:74:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&a[i][j]); ^ user.cpp: In function ‘int main()’: user.cpp:92:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("lenes.in","r",stdin); ^ user.cpp:93:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("lenes.out","w",stdout); ^ user.cpp:96:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&p); ^