Eroare de compilare: user.cpp:16:5: error: ‘int time’ redeclared as different kind of symbol int time,n,m,nr,comp[100010],a,b,lev[100010],low[100010],x,y,i,j,it,beg=1,tt[100010]; ^ In file included from /usr/include/pthread.h:26:0, from /usr/include/i386-linux-gnu/c++/4.8/bits/gthr-default.h:35, from /usr/include/i386-linux-gnu/c++/4.8/bits/gthr.h:148, from /usr/include/c++/4.8/ext/atomicity.h:33, from /usr/include/c++/4.8/bits/ios_base.h:39, from /usr/include/c++/4.8/ios:42, from /usr/include/c++/4.8/ostream:38, from /usr/include/c++/4.8/iostream:39, from user.cpp:1: /usr/include/time.h:186:15: error: previous declaration of ‘time_t time(time_t*)’ extern time_t time (time_t *__timer) __THROW; ^ user.cpp: In function ‘void df(int)’: user.cpp:43:21: error: ISO C++ forbids incrementing a pointer of type ‘time_t (*)(time_t*)throw () {aka long int (*)(long int*)throw ()}’ [-fpermissive] lev[x]=low[x]=++time; ^ user.cpp:43:21: error: lvalue required as increment operand user.cpp:44:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=0; k<v[x].size(); k++) ^ user.cpp: In function ‘int main()’: user.cpp:73:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<ans[i].size(); j++) ^