Compilare: user.cpp: In function ‘void manacher(int, char*, int*)’: user.cpp:13:38: warning: unused variable ‘position’ [-Wunused-variable] int left = 0, right = 0, middle, position; ^ user.cpp: In function ‘int main()’: user.cpp:66:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "pscpld2d.in" , "r", stdin ); ^ user.cpp:67:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "pscpld2d.out", "w", stdout ); ^ user.cpp:81:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%d", &N ); ^ user.cpp:83:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf( "%s", A[i] + 1 ); ^ user.cpp:25:48: warning: ‘middle’ may be used uninitialized in this function [-Wmaybe-uninitialized] int position = middle - (i - middle); ^ user.cpp:13:30: note: ‘middle’ was declared here int left = 0, right = 0, middle, position; ^ user.cpp:25:48: warning: ‘middle’ may be used uninitialized in this function [-Wmaybe-uninitialized] int position = middle - (i - middle); ^ user.cpp:13:30: note: ‘middle’ was declared here int left = 0, right = 0, middle, position; ^