Compilare: user.cpp: In function ‘void do_stuff()’: user.cpp:79:9: warning: unused variable ‘l’ [-Wunused-variable] int l = i - p[i] + 1; ^ user.cpp: In function ‘int main()’: user.cpp:92:39: 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:93:41: 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:95:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:98:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", a[i] + 1); ^ user.cpp: In function ‘void do_stuff()’: user.cpp:74:20: warning: ‘C’ is used uninitialized in this function [-Wuninitialized] int mirror = 2 * C - i; ^ user.cpp:76:5: warning: ‘R’ is used uninitialized in this function [-Wuninitialized] if(i <= R) ^