Compilare: user.cpp: In function ‘int main()’: user.cpp:30:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int l = 0; (1<<l) <= n; ++l){ ^ user.cpp:19:41: warning: array subscript is above array bounds [-Warray-bounds] m[1][1] = 0, m[1][2] = 1, m[1][3] = 0; ^ user.cpp:20:41: warning: array subscript is above array bounds [-Warray-bounds] m[2][1] = 0, m[2][2] = 0, m[2][3] = 1; ^ user.cpp:21:12: warning: array subscript is above array bounds [-Warray-bounds] m[3][1] = c, m[3][2] = b, m[3][3] = a; ^ user.cpp:21:25: warning: array subscript is above array bounds [-Warray-bounds] m[3][1] = c, m[3][2] = b, m[3][3] = a; ^ user.cpp:21:41: warning: array subscript is above array bounds [-Warray-bounds] m[3][1] = c, m[3][2] = b, m[3][3] = a; ^ user.cpp:21:38: warning: array subscript is above array bounds [-Warray-bounds] m[3][1] = c, m[3][2] = b, m[3][3] = a; ^ user.cpp:34:90: warning: array subscript is above array bounds [-Warray-bounds] asd[i][j] = (sol[i][1] * m[1][j] + sol[i][2] * m[2][j] + sol[i][3] * m[3][j]) % mod; ^ user.cpp:34:97: warning: array subscript is above array bounds [-Warray-bounds] asd[i][j] = (sol[i][1] * m[1][j] + sol[i][2] * m[2][j] + sol[i][3] * m[3][j]) % mod; ^ user.cpp:40:80: warning: array subscript is above array bounds [-Warray-bounds] sda[i][j] = (m[i][1] * m[1][j] + m[i][2] * m[2][j] + m[i][3] * m[3][j]) % mod; ^ user.cpp:40:87: warning: array subscript is above array bounds [-Warray-bounds] sda[i][j] = (m[i][1] * m[1][j] + m[i][2] * m[2][j] + m[i][3] * m[3][j]) % mod; ^ user.cpp:50:55: warning: array subscript is above array bounds [-Warray-bounds] g << (sol[1][1] * x + sol[1][2] * y + sol[1][3] * z) % mod << '\n'; ^