Compilare: user.cpp: In function ‘int LCA(int, int)’: user.cpp:49:22: warning: variable ‘copiey’ set but not used [-Wunused-but-set-variable] int copiex = lx, copiey = ly; ^ user.cpp: In function ‘int main()’: user.cpp:145:15: warning: unused variable ‘k’ [-Wunused-variable] int x, y, k, lca, tatalca; ^ user.cpp:145:18: warning: unused variable ‘lca’ [-Wunused-variable] int x, y, k, lca, tatalca; ^ user.cpp:145:23: warning: unused variable ‘tatalca’ [-Wunused-variable] int x, y, k, lca, tatalca; ^ user.cpp:121:15: warning: unused variable ‘y’ [-Wunused-variable] int m, x, y; ^ user.cpp:119:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("lca.in", "r", stdin); ^ user.cpp:120:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("lca.out", "w", stdout); ^