Compilare: user.cpp: In function ‘int rec(int, int, int)’: user.cpp:11:9: warning: unused variable ‘auxi’ [-Wunused-variable] int auxi=i, auxj=j; ^ user.cpp:11:17: warning: unused variable ‘auxj’ [-Wunused-variable] int auxi=i, auxj=j; ^ user.cpp: In function ‘int main()’: user.cpp:147:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zoro.in", "r", stdin); ^ user.cpp:148:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zoro.out", "w", stdout); ^ user.cpp:149:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^ user.cpp:152:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &mat[i][j]); ^