Compilare: user.cpp: In function ‘int main()’: user.cpp:36:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("kfib.in", "r", stdin); ^ user.cpp:37:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("kfib.out", "w", stdout); ^ user.cpp:39:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp: In function ‘void fibb(int)’: user.cpp:9:28: warning: array subscript is above array bounds [-Warray-bounds] a[2][2] = a[1][2] = a[2][1] = 1; ^ user.cpp:9:21: warning: array subscript is above array bounds [-Warray-bounds] a[2][2] = a[1][2] = a[2][1] = 1; ^ user.cpp:9:11: warning: array subscript is above array bounds [-Warray-bounds] a[2][2] = a[1][2] = a[2][1] = 1; ^ user.cpp:9:8: warning: array subscript is above array bounds [-Warray-bounds] a[2][2] = a[1][2] = a[2][1] = 1; ^ user.cpp:10:21: warning: array subscript is above array bounds [-Warray-bounds] b[1][1] = b[2][2] = 1; ^ user.cpp:10:18: warning: array subscript is above array bounds [-Warray-bounds] b[1][1] = b[2][2] = 1; ^ user.cpp:13:58: warning: array subscript is above array bounds [-Warray-bounds] c[1][1] = ((ll)a[1][1]*(ll)b[1][1]+(ll)a[1][2]*(ll)b[2][1])%mod; ^ user.cpp:13:67: warning: array subscript is above array bounds [-Warray-bounds] c[1][1] = ((ll)a[1][1]*(ll)b[1][1]+(ll)a[1][2]*(ll)b[2][1])%mod; ^ user.cpp:14:46: warning: array subscript is above array bounds [-Warray-bounds] c[1][2] = ((ll)a[1][1]*(ll)b[1][2]+(ll)a[1][2]*(ll)b[2][2])%mod; ^ user.cpp:14:58: warning: array subscript is above array bounds [-Warray-bounds] c[1][2] = ((ll)a[1][1]*(ll)b[1][2]+(ll)a[1][2]*(ll)b[2][2])%mod; ^ user.cpp:14:70: warning: array subscript is above array bounds [-Warray-bounds] c[1][2] = ((ll)a[1][1]*(ll)b[1][2]+(ll)a[1][2]*(ll)b[2][2])%mod; ^ user.cpp:14:67: warning: array subscript is above array bounds [-Warray-bounds] c[1][2] = ((ll)a[1][1]*(ll)b[1][2]+(ll)a[1][2]*(ll)b[2][2])%mod; ^ user.cpp:14:19: warning: array subscript is above array bounds [-Warray-bounds] c[1][2] = ((ll)a[1][1]*(ll)b[1][2]+(ll)a[1][2]*(ll)b[2][2])%mod; ^