Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:19:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(unsigned i = 0; i < h; i++) ^ user.cpp:20:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(unsigned j = 0; j < w; j++) ^ user.cpp:22:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(unsigned i = 0; i < k; i++) ^ user.cpp:26:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(unsigned r = 0; r < h; r++) ^ user.cpp:28:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(unsigned j = 0; j < w; j++) ^ user.cpp:30:29: error: call of overloaded ‘abs(unsigned int)’ is ambiguous if(abs(o-1-j)+abs(s-1-r) <= c) ^ user.cpp:30:29: note: candidates are: In file included from /usr/include/c++/4.8/cstdlib:72:0, from /usr/include/c++/4.8/ext/string_conversions.h:41, from /usr/include/c++/4.8/bits/basic_string.h:2815, from /usr/include/c++/4.8/string:52, from /usr/include/c++/4.8/bits/locale_classes.h:40, from /usr/include/c++/4.8/bits/ios_base.h:41, 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/stdlib.h:771:12: note: int abs(int) extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur; ^ user.cpp:6:7: note: short int abs(short int) short abs(short a) ^ In file included from /usr/include/c++/4.8/ext/string_conversions.h:41:0, from /usr/include/c++/4.8/bits/basic_string.h:2815, from /usr/include/c++/4.8/string:52, from /usr/include/c++/4.8/bits/locale_classes.h:40, from /usr/include/c++/4.8/bits/ios_base.h:41, 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/c++/4.8/cstdlib:174:3: note: long long int std::abs(long long int) abs(long long __x) { return __builtin_llabs (__x); } ^ /usr/include/c++/4.8/cstdlib:166:3: note: long int std::abs(long int) abs(long __i) { return __builtin_labs(__i); }