Compilare: user.cpp: In function ‘int Find(int, int)’: user.cpp:18:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] FOR(i, 0, v[type][x % mod].size() - 1) ^ user.cpp:7:42: note: in definition of macro ‘FOR’ #define FOR(i, x, y) for(int i = x; i <= y; ++i) ^ user.cpp:19:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v[type][x % mod][i].el == x) return 1; ^ user.cpp: In function ‘void Insert(int, int)’: user.cpp:25:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] FOR(i, 0, v[type][x % mod].size() - 1) ^ user.cpp:7:42: note: in definition of macro ‘FOR’ #define FOR(i, x, y) for(int i = x; i <= y; ++i) ^ user.cpp:26:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v[type][x % mod][i].el == x) { ^ user.cpp: In function ‘void Delete(int, int)’: user.cpp:36:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] FOR(i, 0, v[type][x % mod].size() - 1) ^ user.cpp:7:42: note: in definition of macro ‘FOR’ #define FOR(i, x, y) for(int i = x; i <= y; ++i) ^ user.cpp:37:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v[type][x % mod][i].el == x) { ^ user.cpp: In function ‘int main()’: user.cpp:52:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] FOR(i, 1, n) ^ user.cpp:7:42: note: in definition of macro ‘FOR’ #define FOR(i, x, y) for(int i = x; i <= y; ++i) ^