Compilare: user.cpp: In function ‘int main()’: user.cpp:7:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define For(i, x, y) for(int i = x; i <= y; ++i) user.cpp:53:9: For(i, 1, v.size() - 1){ ~~~~~~~~~~~~~~~~~~ user.cpp:53:5: note: in expansion of macro ‘For’ For(i, 1, v.size() - 1){ ^~~ user.cpp:7:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define For(i, x, y) for(int i = x; i <= y; ++i) user.cpp:83:21: For(i, 0, v.size() - 1) ~~~~~~~~~~~~~~~~~~ user.cpp:83:17: note: in expansion of macro ‘For’ For(i, 0, v.size() - 1) ^~~ user.cpp:65:10: warning: unused variable ‘mx1’ [-Wunused-variable] int mx1 = 0, mx2 = 0, sum = 0; ^~~ user.cpp:65:19: warning: unused variable ‘mx2’ [-Wunused-variable] int mx1 = 0, mx2 = 0, sum = 0; ^~~