Eroare de compilare: user.cpp:34:27: warning: multi-character character constant [-Wmultichar] a[0][i]=a[n+1][i]='-1'; ^~~~ user.cpp:36:27: warning: multi-character character constant [-Wmultichar] a[i][0]=a[i][m+1]='-1'; ^~~~ user.cpp:6:31: error: ‘int time’ redeclared as different kind of symbol int n,m,xj,yj,xr,yr,minim=101,time; ^~~~ In file included from /usr/include/pthread.h:24:0, from /usr/include/x86_64-linux-gnu/c++/6/32/bits/gthr-default.h:35, from /usr/include/x86_64-linux-gnu/c++/6/32/bits/gthr.h:148, from /usr/include/c++/6/ext/atomicity.h:35, from /usr/include/c++/6/bits/ios_base.h:39, from /usr/include/c++/6/ios:42, from /usr/include/c++/6/istream:38, from /usr/include/c++/6/fstream:38, from user.cpp:1: /usr/include/time.h:192:15: note: previous declaration ‘time_t time(time_t*)’ extern time_t time (time_t *__timer) __THROW; ^~~~ user.cpp: In function ‘int main()’: user.cpp:34:27: warning: overflow in implicit constant conversion [-Woverflow] a[0][i]=a[n+1][i]='-1'; ^~~~ user.cpp:36:27: warning: overflow in implicit constant conversion [-Woverflow] a[i][0]=a[i][m+1]='-1'; ^~~~ user.cpp:30:17: warning: unused variable ‘j’ [-Wunused-variable] { int pi=1,ps=1,j,i,p; ^