Compilare: user.cpp: In function ‘int main()’: user.cpp:44:15: warning: unused variable ‘x’ [-Wunused-variable] long long x,y,z,w,u; ^ user.cpp:44:17: warning: unused variable ‘y’ [-Wunused-variable] long long x,y,z,w,u; ^ user.cpp:44:19: warning: unused variable ‘z’ [-Wunused-variable] long long x,y,z,w,u; ^ user.cpp:44:21: warning: unused variable ‘w’ [-Wunused-variable] long long x,y,z,w,u; ^ user.cpp:44:23: warning: unused variable ‘u’ [-Wunused-variable] long long x,y,z,w,u; ^ user.cpp:34:47: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%lld%lld%lld%lld",&N,&M,&C,&R); ^ user.cpp:35:54: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%lld%lld%lld%lld%lld",&X,&Y,&Z,&W,&U); ^ user.cpp:36:53: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(i=1; i<=M; ++i) {fscanf(fin,"%lld",&A[1][i]); Maxim=max(Maxim,A[1][i]);} ^ user.cpp:37:53: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(i=2; i<=N; ++i) {fscanf(fin,"%lld",&A[i][1]); Maxim=max(Maxim,A[i][1]);} ^